Year	% of population
2001	14.4
2002	12.8
2003	10.3
2004	9.4
2005	8.5
2006	7.8
2007	7.3
2008	6.9
2009	6.5
2010	6.3
2011	6
2012	5.7
2013	5.6
2014	5.3
2015	5
2016	4.3
2017	3.6
2018	3.2
2019	3.3
2020	3.6
2021	3.1