Year	% of population
2008	14.4655972309527
2009	13.7078143457077
2010	16.6959518494697
2011	17.1249477961698
2012	17.6629493457515
2013	17.62871320955
2014	19.6351363137175
2015	19.0623288008562
2016	25.8124749660541
2017	23.2224148216423
2018	16.5681707575041
2019	23.4005107378627