1679-4974 1679-4974 S1679-49742021000100001 10.1590/s1679-49742021000100001 Brasil Brasil 00 03 2021 00 03 2021 30 1 United Nations 2019 United Nations 2015 International Labour Organization 1999 Brasil 2000 Brasil 2018 Brasil 2008 International Labour Office 2017 Instituto Brasileiro de Geografia e Estatística 2020 UNICEF Data 2020 2003 8 4 4 1029-37