Year	% of population
2001	7.6
2002	7.1
2003	7.4
2004	7.5
2005	7.9
2006	8.1
2007	8.8
2008	9.4
2009	9.3
2010	8.7
2011	8.1
2012	7.9
2013	7.9
2014	7.6
2015	8
2016	7.7
2017	7.3
2018	6.3
2019	6.6
2020	7.5
2021	8.3