World Bank open data, can be found at: https://data.worldbank.org/

Национальный статистический комитет Республики Беларусь (National Statistical Committee of the Republic of Belarus), can be found at: https://www.belstat.gov.by/

United Nations (UN), Department of Economic and Social Affairs Population Dynamics, World Population Prospects 2019, can be found at: https://population.un.org/wpp/