{"entity":{"iso2":"TO","iso3":"TON","name":"Tonga","slug":"tonga"},"indicator":{"licence":"CC BY 4.0 (World Bank Open Data)","slug":"barro-lee-average-years-of-primary-schooling-age-35-39-total","source":"Robert J. Barro and Jong-Wha Lee: http://www.barrolee.com/","source_url":"https://data.worldbank.org/indicator/BAR.PRM.SCHL.3539","title":"Barro-Lee: Average years of primary schooling, age 35-39, total","unit":null},"observations":[{"date":"1960-01-01","value":4.42},{"date":"1965-01-01","value":4.45},{"date":"1970-01-01","value":4.83},{"date":"1975-01-01","value":4.9},{"date":"1980-01-01","value":4.9},{"date":"1985-01-01","value":4.97},{"date":"1990-01-01","value":5.64},{"date":"1995-01-01","value":5.82},{"date":"2000-01-01","value":5.85},{"date":"2005-01-01","value":5.81},{"date":"2010-01-01","value":5.93}],"summary":{"latest_period":"2010-01-01","latest_value":5.93,"max":5.93,"mean":5.22909,"min":4.42,"of":144,"rank":33,"trend":"rising"}}