Year	% of population
2001	3.8
2002	4.1
2003	4.6
2004	4.8
2005	5.2
2006	4.8
2007	4.5
2008	4.1
2009	4.2
2010	4.2
2011	4.2
2012	4.1
2013	4.7
2014	5
2015	5.6
2016	5.6
2017	6.1
2018	6.4
2019	6.8
2020	7.1
2021	6.7