Statizoid

Theoretical duration of secondary education (years), annual growth in Tonga

Tonga: Theoretical duration of secondary education (years), annual growth was 0 % change on previous year in 2025. ◆ Volatile

Latest (2025)
0 % change on previous year
World rank
1st
of 221 countries
All-time high
16.67 % change on previous year
in 1984
All-time low
-14.29 % change on previous year
in 1998
Years of data
55
1971–2025

Theoretical duration of secondary education (years), annual growth in Tonga, 1971–2025

-1001020197119982025

Source: Statizoid (derived). Measured in % change on previous year.

Analysis

The most recent figure for theoretical duration of secondary education (years), annual growth in Tonga is 0 % change on previous year, measured in 2025.

Over the whole period, theoretical duration of secondary education (years), annual growth in Tonga peaked at 16.67 % change on previous year in 1984 and was at its lowest, -14.29 % change on previous year, in 1998.

Tonga ranks 1st of 221 countries on this measure, in the top 10%.

The series is highly variable year to year, so single readings are best treated with caution.

Theoretical duration of secondary education (years), annual growth in Tonga, year by year

Year % change on previous year Change
1971 0 % change on previous year —
1972 0 % change on previous year —
1973 0 % change on previous year —
1974 0 % change on previous year —
1975 0 % change on previous year —
1976 0 % change on previous year —
1977 0 % change on previous year —
1978 0 % change on previous year —
1979 0 % change on previous year —
1980 0 % change on previous year —
1981 0 % change on previous year —
1982 0 % change on previous year —
1983 0 % change on previous year —
1984 16.67 % change on previous year —
1985 0 % change on previous year -100.0%
1986 0 % change on previous year —
1987 0 % change on previous year —
1988 0 % change on previous year —
1989 0 % change on previous year —
1990 0 % change on previous year —
1991 0 % change on previous year —
1992 0 % change on previous year —
1993 0 % change on previous year —
1994 0 % change on previous year —
1995 0 % change on previous year —
1996 0 % change on previous year —
1997 0 % change on previous year —
1998 -14.29 % change on previous year —
1999 0 % change on previous year -100.0%
2000 0 % change on previous year —
2001 0 % change on previous year —
2002 0 % change on previous year —
2003 0 % change on previous year —
2004 0 % change on previous year —
2005 0 % change on previous year —
2006 0 % change on previous year —
2007 0 % change on previous year —
2008 0 % change on previous year —
2009 0 % change on previous year —
2010 0 % change on previous year —
2011 0 % change on previous year —
2012 16.67 % change on previous year —
2013 0 % change on previous year -100.0%
2014 0 % change on previous year —
2015 0 % change on previous year —
2016 0 % change on previous year —
2017 0 % change on previous year —
2018 0 % change on previous year —
2019 0 % change on previous year —
2020 0 % change on previous year —
2021 0 % change on previous year —
2022 0 % change on previous year —
2023 0 % change on previous year —
2024 0 % change on previous year —
2025 0 % change on previous year —

Averages by decade

DecadeAverage LowestHighest Years
1970s 0 % change on previous year 0 % change on previous year 0 % change on previous year 9
1980s 1.67 % change on previous year 0 % change on previous year 16.67 % change on previous year 10
1990s -1.43 % change on previous year -14.29 % change on previous year 0 % change on previous year 10
2000s 0 % change on previous year 0 % change on previous year 0 % change on previous year 10
2010s 1.67 % change on previous year 0 % change on previous year 16.67 % change on previous year 10
2020s 0 % change on previous year 0 % change on previous year 0 % change on previous year 6

Countries ranked near Tonga

  1. 1 Aruba 0 % change on previous year
  2. 1 Afghanistan 0 % change on previous year
  3. 1 Angola 0 % change on previous year compare
  4. 1 Albania 0 % change on previous year compare
  5. 1 Andorra 0 % change on previous year compare
  6. 1 United Arab Emirates 0 % change on previous year compare
  7. 1 Argentina 0 % change on previous year compare
  8. 1 Armenia 0 % change on previous year compare
  9. 1 American Samoa 0 % change on previous year compare
  10. 1 Antigua and Barbuda 0 % change on previous year
  11. 1 Australia 0 % change on previous year
  12. 1 Austria 0 % change on previous year
  13. 1 Azerbaijan 0 % change on previous year
  14. 1 Burundi 0 % change on previous year compare
  15. 1 Belgium 0 % change on previous year
  16. 1 Benin 0 % change on previous year
  17. 1 Burkina Faso 0 % change on previous year
  18. 1 Bangladesh 0 % change on previous year
  19. 1 Bulgaria 0 % change on previous year compare
  20. 1 Bahrain 0 % change on previous year
  21. 1 Bahamas 0 % change on previous year
  22. 1 Bosnia and Herzegovina 0 % change on previous year
  23. 1 Belarus 0 % change on previous year compare
  24. 1 Belize 0 % change on previous year
  25. 1 Bermuda 0 % change on previous year compare
  26. 1 Bolivia, Plurinational State of 0 % change on previous year
  27. 1 Brazil 0 % change on previous year
  28. 1 Barbados 0 % change on previous year compare
  29. 1 Brunei Darussalam 0 % change on previous year
  30. 1 Bhutan 0 % change on previous year compare
  31. 1 Botswana 0 % change on previous year
  32. 1 Central African Republic 0 % change on previous year
  33. 1 Canada 0 % change on previous year
  34. 1 Switzerland 0 % change on previous year
  35. 1 Chile 0 % change on previous year compare
  36. 1 China 0 % change on previous year compare
  37. 1 Côte d'Ivoire 0 % change on previous year
  38. 1 Cameroon 0 % change on previous year
  39. 1 Congo, Democratic Republic of the 0 % change on previous year
  40. 1 Congo 0 % change on previous year
  41. 1 Colombia 0 % change on previous year
  42. 1 Comoros 0 % change on previous year
  43. 1 Cape Verde 0 % change on previous year compare
  44. 1 Costa Rica 0 % change on previous year
  45. 1 Cuba 0 % change on previous year compare
  46. 1 Curacao 0 % change on previous year
  47. 1 Cayman Islands 0 % change on previous year
  48. 1 Cyprus 0 % change on previous year
  49. 1 Czechia 0 % change on previous year
  50. 1 Germany 0 % change on previous year
  51. 1 Djibouti 0 % change on previous year
  52. 1 Dominica 0 % change on previous year
  53. 1 Denmark 0 % change on previous year
  54. 1 Dominican Republic 0 % change on previous year
  55. 1 Algeria 0 % change on previous year compare
  56. 1 Ecuador 0 % change on previous year
  57. 1 Egypt 0 % change on previous year
  58. 1 Eritrea 0 % change on previous year compare
  59. 1 Spain 0 % change on previous year compare
  60. 1 Estonia 0 % change on previous year
  61. 1 Ethiopia 0 % change on previous year
  62. 1 Finland 0 % change on previous year
  63. 1 Fiji 0 % change on previous year compare
  64. 1 France 0 % change on previous year
  65. 1 Micronesia (country) 0 % change on previous year
  66. 1 Gabon 0 % change on previous year
  67. 1 United Kingdom of Great Britain and Northern Ireland 0 % change on previous year
  68. 1 Georgia 0 % change on previous year compare
  69. 1 Ghana 0 % change on previous year compare
  70. 1 Gibraltar 0 % change on previous year compare
  71. 1 Guinea 0 % change on previous year compare
  72. 1 Gambia 0 % change on previous year compare
  73. 1 Guinea-Bissau 0 % change on previous year compare
  74. 1 Equatorial Guinea 0 % change on previous year compare
  75. 1 Greece 0 % change on previous year
  76. 1 Grenada 0 % change on previous year
  77. 1 Guatemala 0 % change on previous year
  78. 1 Guyana 0 % change on previous year
  79. 1 Hong Kong 0 % change on previous year compare
  80. 1 Honduras 0 % change on previous year compare
  81. 1 Croatia 0 % change on previous year
  82. 1 Haiti 0 % change on previous year compare
  83. 1 Hungary 0 % change on previous year
  84. 1 Indonesia 0 % change on previous year
  85. 1 India 0 % change on previous year
  86. 1 Ireland 0 % change on previous year
  87. 1 Iran 0 % change on previous year compare
  88. 1 Iraq 0 % change on previous year
  89. 1 Iceland 0 % change on previous year
  90. 1 Israel 0 % change on previous year
  91. 1 Italy 0 % change on previous year
  92. 1 Jamaica 0 % change on previous year compare
  93. 1 Jordan 0 % change on previous year
  94. 1 Japan 0 % change on previous year
  95. 1 Kazakhstan 0 % change on previous year
  96. 1 Kenya 0 % change on previous year compare
  97. 1 Kyrgyzstan 0 % change on previous year
  98. 1 Cambodia 0 % change on previous year
  99. 1 Kiribati 0 % change on previous year compare
  100. 1 Saint Kitts and Nevis 0 % change on previous year compare
  101. 1 Republic of Korea 0 % change on previous year
  102. 1 Kuwait 0 % change on previous year compare
  103. 1 Lao People's Democratic Republic 0 % change on previous year compare
  104. 1 Lebanon 0 % change on previous year compare
  105. 1 Liberia 0 % change on previous year
  106. 1 Libya 0 % change on previous year
  107. 1 Saint Lucia 0 % change on previous year
  108. 1 Liechtenstein 0 % change on previous year
  109. 1 Sri Lanka 0 % change on previous year compare
  110. 1 Lesotho 0 % change on previous year compare
  111. 1 Lithuania 0 % change on previous year
  112. 1 Luxembourg 0 % change on previous year
  113. 1 Latvia 0 % change on previous year compare
  114. 1 Macao 0 % change on previous year
  115. 1 Morocco 0 % change on previous year compare
  116. 1 Monaco 0 % change on previous year
  117. 1 Republic of Moldova 0 % change on previous year compare
  118. 1 Madagascar 0 % change on previous year
  119. 1 Maldives 0 % change on previous year compare
  120. 1 Mexico 0 % change on previous year
  121. 1 Marshall Islands 0 % change on previous year
  122. 1 North Macedonia 0 % change on previous year
  123. 1 Mali 0 % change on previous year
  124. 1 Malta 0 % change on previous year
  125. 1 Myanmar 0 % change on previous year
  126. 1 Montenegro 0 % change on previous year
  127. 1 Mongolia 0 % change on previous year compare
  128. 1 Mozambique 0 % change on previous year compare
  129. 1 Mauritania 0 % change on previous year compare
  130. 1 Mauritius 0 % change on previous year
  131. 1 Malawi 0 % change on previous year compare
  132. 1 Malaysia 0 % change on previous year
  133. 1 Namibia 0 % change on previous year
  134. 1 New Caledonia 0 % change on previous year
  135. 1 Niger 0 % change on previous year
  136. 1 Nigeria 0 % change on previous year compare
  137. 1 Nicaragua 0 % change on previous year
  138. 1 Netherlands 0 % change on previous year compare
  139. 1 Norway 0 % change on previous year
  140. 1 Nepal 0 % change on previous year compare
  141. 1 Naoero 0 % change on previous year compare
  142. 1 New Zealand 0 % change on previous year
  143. 1 Oman 0 % change on previous year compare
  144. 1 Pakistan 0 % change on previous year
  145. 1 Panama 0 % change on previous year
  146. 1 Peru 0 % change on previous year
  147. 1 Philippines 0 % change on previous year compare
  148. 1 Palau 0 % change on previous year compare
  149. 1 Papua New Guinea 0 % change on previous year
  150. 1 Poland 0 % change on previous year compare
  151. 1 Puerto Rico 0 % change on previous year
  152. 1 North Korea 0 % change on previous year
  153. 1 Portugal 0 % change on previous year compare
  154. 1 Paraguay 0 % change on previous year
  155. 1 Palestine, State of 0 % change on previous year
  156. 1 French Polynesia 0 % change on previous year
  157. 1 Qatar 0 % change on previous year
  158. 1 Romania 0 % change on previous year
  159. 1 Russian Federation 0 % change on previous year
  160. 1 Rwanda 0 % change on previous year compare
  161. 1 Saudi Arabia 0 % change on previous year
  162. 1 Sudan 0 % change on previous year compare
  163. 1 Senegal 0 % change on previous year
  164. 1 Singapore 0 % change on previous year compare
  165. 1 Solomon Islands 0 % change on previous year compare
  166. 1 Sierra Leone 0 % change on previous year compare
  167. 1 El Salvador 0 % change on previous year compare
  168. 1 San Marino 0 % change on previous year
  169. 1 Somalia 0 % change on previous year compare
  170. 1 Serbia 0 % change on previous year
  171. 1 South Sudan 0 % change on previous year
  172. 1 Sao Tome and Principe 0 % change on previous year compare
  173. 1 Suriname 0 % change on previous year compare
  174. 1 Slovakia 0 % change on previous year compare
  175. 1 Slovenia 0 % change on previous year compare
  176. 1 Sweden 0 % change on previous year
  177. 1 Eswatini 0 % change on previous year
  178. 1 Sint Maarten (Dutch part) 0 % change on previous year
  179. 1 Seychelles 0 % change on previous year compare
  180. 1 Syria 0 % change on previous year compare
  181. 1 Turks and Caicos Islands 0 % change on previous year
  182. 1 Chad 0 % change on previous year
  183. 1 Togo 0 % change on previous year
  184. 1 Thailand 0 % change on previous year compare
  185. 1 Tajikistan 0 % change on previous year
  186. 1 Turkmenistan 0 % change on previous year compare
  187. 1 Timor-Leste 0 % change on previous year
  188. 1 Trinidad and Tobago 0 % change on previous year
  189. 1 Tunisia 0 % change on previous year
  190. 1 Türkiye 0 % change on previous year compare
  191. 1 Tuvalu 0 % change on previous year compare
  192. 1 Tanzania, United Republic of 0 % change on previous year
  193. 1 Uganda 0 % change on previous year
  194. 1 Ukraine 0 % change on previous year
  195. 1 Uruguay 0 % change on previous year
  196. 1 United States 0 % change on previous year
  197. 1 Uzbekistan 0 % change on previous year compare
  198. 1 Saint Vincent and the Grenadines 0 % change on previous year compare
  199. 1 Venezuela, Bolivarian Republic of 0 % change on previous year
  200. 1 British Virgin Islands 0 % change on previous year compare
  201. 1 United States Virgin Islands 0 % change on previous year
  202. 1 Viet Nam 0 % change on previous year compare
  203. 1 Vanuatu 0 % change on previous year
  204. 1 Samoa 0 % change on previous year
  205. 1 Yemen 0 % change on previous year
  206. 1 South Africa 0 % change on previous year
  207. 1 Zambia 0 % change on previous year
  208. 1 Zimbabwe 0 % change on previous year
  209. 1 French Guiana 0 % change on previous year
  210. 1 Guadeloupe 0 % change on previous year
  211. 1 Martinique 0 % change on previous year
  212. 1 Reunion 0 % change on previous year
  213. 1 Western Sahara 0 % change on previous year
  214. 1 Anguilla 0 % change on previous year
  215. 1 Cook Islands 0 % change on previous year compare
  216. 1 Montserrat 0 % change on previous year
  217. 1 Niue 0 % change on previous year compare
  218. 1 Saint Helena 0 % change on previous year
  219. 1 Saint Pierre and Miquelon 0 % change on previous year
  220. 1 Tokelau 0 % change on previous year compare

See the full ranking of 221 places →

More education data for Tonga

All data for Tonga →

Frequently asked questions

What is theoretical duration of secondary education (years), annual growth in Tonga?
Theoretical duration of secondary education (years), annual growth in Tonga was 0 % change on previous year in 2025, according to Statizoid (derived).
What is the highest theoretical duration of secondary education (years), annual growth recorded in Tonga?
The highest recorded value was 16.67 % change on previous year in 1984.
What is the lowest theoretical duration of secondary education (years), annual growth recorded in Tonga?
The lowest recorded value was -14.29 % change on previous year in 1998.
How does Tonga rank for theoretical duration of secondary education (years), annual growth?
Tonga ranks 1st out of 221 countries with data for 2025.
Where does this Tonga data come from?
The figures come from Statizoid (derived), published as part of Theoretical duration of secondary education (years), annual growth rate. Statizoid updates them automatically from the source API.

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Theoretical duration of secondary education (years), annual growth in Tonga. Statizoid, drawing on Statizoid (derived). Retrieved 30 August 2026, from https://education.statizoid.com/stat/theoretical-duration-of-secondary-education-years-annual-growth-rate/tonga/

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<a href="https://education.statizoid.com/stat/theoretical-duration-of-secondary-education-years-annual-growth-rate/tonga/">Theoretical duration of secondary education (years), annual growth in Tonga</a> — Statizoid

How this figure is calculated

The year-on-year percentage change in Theoretical duration of secondary education (years). Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.

Computed from

Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.

About this data

Indicator
Theoretical duration of secondary education (years), annual growth rate
Unit
% change on previous year
Source
Statizoid (derived)
Licence
Derived by Statizoid from the sources named on the page
Coverage
221 places, 11,587 data points, 1971–2025
Last refreshed

The year-on-year percentage change in Theoretical duration of secondary education (years). Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.