Year	% of population
2001	20.7
2002	19
2003	17.3
2004	15.6
2005	13.9
2006	12.9
2007	12.4
2008	12.3
2009	12
2010	11.8
2011	12.5
2012	15.2
2013	20
2014	27.2
2015	31.9
2016	34
2017	31.6
2018	33
2019	38.1
2020	43.7
2021	46