Year	% of population
2001	7.2
2002	5.5
2003	4.5
2004	3.8
2005	3.9
2006	3.9
2007	3.9
2008	3.5
2009	3.7
2010	4.2
2011	4.6
2012	4.3
2013	4
2014	3.6
2015	3.6
2016	3.7
2017	3.7
2018	3.1
2019	3.1
2020	3
2021	2.9