Year	% of population
2001	21.4
2002	22.8
2003	23
2004	21.6
2005	18.7
2006	15.6
2007	13.6
2008	11.4
2009	9.5
2010	8.4
2011	7.4
2012	6.4
2013	5.4
2014	5.1
2015	5.5
2016	6.1
2017	6.3
2018	5.9
2019	6.2
2020	6.5
2021	7