Year	% of population
2001	42.8
2002	37.8
2003	34.3
2004	33.6
2005	33.1
2006	32.7
2007	32.4
2008	33
2009	32.9
2010	32.9
2011	31.9
2012	31.1
2013	29.8
2014	28.4
2015	27.6
2016	27.1
2017	26.1
2018	25
2019	23.8
2020	23.7
2021	22.3