Year	% of population
2008	14.2851847991012
2009	13.9683676883761
2010	15.7509385452313
2011	15.2712733752513
2012	18.196038630821
2013	16.3411721902441
2014	15.6508939577336
2015	13.9741331888241
2016	13.7936611315533
2017	15.2562654747013
2018	13.7402976845137
2019	14.5048657718121
2020	12.3216331097278
2021	13.3979238132734