{"entity":{"iso2":"AU","iso3":"AUS","name":"Australia","slug":"australia"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"ipv1-number-unvaccinated","source":"WHO & UNICEF (2025); UN, World Population Prospects (2024) \u2013 processed by Our World in Data","source_url":"https://ourworldindata.org/grapher/ipv1-number-unvaccinated","title":"Number of one-year-olds who have not received the inactivated polio vaccine","unit":"one-year-olds"},"observations":[{"date":"2015-01-01","value":21809.4},{"date":"2016-01-01","value":18871.5},{"date":"2017-01-01","value":15810.4},{"date":"2018-01-01","value":15554.0},{"date":"2019-01-01","value":15293.2},{"date":"2020-01-01","value":15128.8},{"date":"2021-01-01","value":15037.2},{"date":"2022-01-01","value":18234.2},{"date":"2023-01-01","value":18397.4}],"summary":{"latest_period":"2023-01-01","latest_value":18397.4,"max":21809.4,"mean":17126.3,"min":15037.2,"of":194,"rank":82,"trend":"falling"}}