1. ESA https://esa.un.org/unpd/wpp/publ 2015.
2. Trump http://time.com/5100328/shithole-countries-trump-reactions/ 2018.
3. UNDP http://hdr.undp.org/en/content/h 2018.
4. GINI https://www.cia.gov/library/publications/the-world-factbook/rankorder/2172rank.html 2018.