Year	% of population
2007	12.1689907334027
2008	23.7560160610201
2009	35.952390792247
2010	37.0542150627961
2011	34.6836577236338
2012	37.4573947946712
2013	36.7759380628205
2014	39.5682774966758
2015	33.7150825423958
2016	72.6649583981708
2017	63.335941681986
2018	62.3728404117031
2019	58.1172695026904