Year	% of population
2001	10.7
2002	9.3
2003	7.9
2004	6.9
2005	6.5
2006	6.2
2007	5.6
2008	5.1
2009	4.3
2010	3.7
2011	3.2
2012	3
2013	2.8
2014	2.6
2015	2.5
2016	2.5
2017	2.5
2018	2.5
2019	2.5
2020	3.7
2021	4.7