* Downloaded from:
+ https://statbel.fgov.be/nl/open-data?category=214&page=0
+ https://statbel.fgov.be/nl/open-data?category=214&page=1

* License:
+ Creative Commons Attribution
+ https://statbel.fgov.be/sites/default/files/files/opendata/Licence%20open%20data_NL.pdf

* Criteria about how to count:
+ Sum of total population from 2009 to 2019
+ Source: bemales.py, befemales.py