Year	% of population
2008	16.1980160926353
2009	22.6437271436611
2010	15.0402654339793
2011	16.768529218239
2012	16.0332526244716
2014	19.823153392647
2015	20.6420807888979
2016	20.1835597359994
2017	22.9862036918669
2018	18.5454125747091
2019	19.8423898975614
2020	21.3856261511214