Year	% of population
2001	5.4
2002	5.6
2003	6
2004	6
2005	6.1
2006	6.4
2007	7
2008	7.3
2009	10.4
2010	12.6
2011	14.9
2012	13.5
2013	12.6
2014	11.4
2015	10.9
2016	10.9
2017	10.9
2018	11.5
2019	12.2
2020	12.1
2021	12.1