Year	% of population
1994	10.5
1995	11.2
1996	10.5
1997	11
1998	10.2
1999	9.7
2000	9.5
2003	10.2
2004	9.8
2005	9.5
2006	9.4
2007	11.4
2008	11.9
2009	12.3
2010	11.8
2011	11.2
2012	12.2
2013	10.6
2014	11.8
2015	12.8
2016	12.1
2017	12
2018	11.9
2019	11.4
2020	12.1
2021	12.5