@techreport{United Nations2019,
author = {United Nations, Department of Economic and Social Affairs, Population Division,},
title= {World population prospects 2019: Methodology of the United Nations population
estimates and projection},
year = {2019},
URL = {https://population.un.org/wpp/Publications/Files/WPP2019_Methodology.pdf},
publisher = {United Nations},
address = {New York},
}