Year	% of population
2008	2.07786694838972
2010	2.22449537260091
2011	2.59677696048398
2012	3.33972696264833
2014	3.4460074922668
2015	4.16988813582883
2016	4.57627219936046
2017	3.63180753218004
2018	3.78969250353276
2019	4.17508030610731
2020	3.22540079938381