The Lancet
Nov 10, 2018 Volume 392 Number 10159 p1683-2138 e14-e18
https://www.thelancet.com/journals/lancet/issue/current
Population and fertility by age and sex for 195 countries and territories, 1950–2017: a systematic analysis for the Global Burden of Disease Study 2017
GBD 2017 Population and Fertility Collaborators