Year	% of population
2007	2.34613713424521
2008	2.43888470597878
2009	2.26235157574292
2010	2.4881838957947
2011	2.65944512662078
2012	2.43709831193983
2013	2.74999864931304
2014	2.58724675621975
2015	2.55852988250537
2016	2.46666673272055
2017	2.45066712522955
2018	2.08428376328878
2019	1.75393802260007