Year	% of population
2001	17.3
2002	15.6
2003	13.7
2004	13.2
2005	12
2006	11
2007	10.1
2008	9.1
2009	9.1
2010	8.6
2011	8.6
2012	8.4
2013	8.2
2014	8.2
2015	8.1
2016	8.7
2017	9.5
2018	10.4
2019	10.6
2020	10.2
2021	9.9