Year	% of population
2007	13.210727205301
2008	16.6096739369054
2009	13.9056282627507
2010	14.2928722115651
2011	12.7725401329933
2012	12.9236341626275
2014	14.2106676289696
2015	13.0096583760767
2016	12.9820024784479
2017	13.8030558853173
2018	14.7068822098643
2019	14.8786072028352