{"entity":{"iso2":"TO","iso3":"TON","name":"Tonga","slug":"tonga"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"polio-number-unvaccinated","source":"WHO & UNICEF (2025); UN, World Population Prospects (2024) \u2013 processed by Our World in Data","source_url":"https://ourworldindata.org/grapher/polio-number-unvaccinated","title":"Number of one-year-olds who are not vaccinated against polio","unit":"one-year-olds"},"observations":[{"date":"1980-01-01","value":2453.6},{"date":"1981-01-01","value":1909.53},{"date":"1982-01-01","value":602.2},{"date":"1983-01-01","value":1292.58},{"date":"1984-01-01","value":1627.56},{"date":"1985-01-01","value":577.22},{"date":"1986-01-01","value":829.71},{"date":"1987-01-01","value":401.05},{"date":"1988-01-01","value":245.36},{"date":"1989-01-01","value":210.84},{"date":"1990-01-01","value":205.17},{"date":"1991-01-01","value":229.76},{"date":"1992-01-01","value":28.44},{"date":"1993-01-01","value":113.48},{"date":"1994-01-01","value":284.1},{"date":"1995-01-01","value":200.76},{"date":"1996-01-01","value":28.94},{"date":"1997-01-01","value":114.92},{"date":"1998-01-01","value":85.8},{"date":"1999-01-01","value":171.96},{"date":"2000-01-01","value":143.25},{"date":"2001-01-01","value":144.2},{"date":"2002-01-01","value":289.0},{"date":"2003-01-01","value":57.88},{"date":"2004-01-01","value":29.29},{"date":"2005-01-01","value":29.59},{"date":"2006-01-01","value":29.65},{"date":"2007-01-01","value":29.5},{"date":"2008-01-01","value":29.19},{"date":"2009-01-01","value":28.64},{"date":"2010-01-01","value":28.33},{"date":"2011-01-01","value":29.21},{"date":"2012-01-01","value":145.1},{"date":"2013-01-01","value":27.83},{"date":"2014-01-01","value":54.76},{"date":"2015-01-01","value":108.64},{"date":"2016-01-01","value":107.68},{"date":"2017-01-01","value":25.99},{"date":"2018-01-01","value":24.98},{"date":"2019-01-01","value":24.33},{"date":"2020-01-01","value":23.81},{"date":"2021-01-01","value":23.6},{"date":"2022-01-01","value":23.84},{"date":"2023-01-01","value":23.98}],"summary":{"latest_period":"2023-01-01","latest_value":23.98,"max":2453.6,"mean":297.619,"min":23.6,"of":194,"rank":184,"trend":"volatile"}}