Year	% of population
2000	8.6
2001	8.65
2002	8.4
2003	8.4
2004	8.5
2005	8.4
2006	8.3
2007	8.2
2008	8.2
2009	8.2
2010	8.2
2011	8.1
2012	8.1
2013	8.3
2014	8.3
2015	8.3
2016	8.4
2017	8.4
2018	8.4
2019	8.6
2020	8.8
2021	8.8
2022	8.7