Year	% of population
2000	2.1
2001	4.7
2002	7.4
2003	9.8
2004	12.4
2005	15
2006	15.2
2007	20.2
2008	22.9
2009	25.5
2010	52.3
2011	52
2012	51.8
2013	51.5
2014	51.4
2015	51.2
2016	51.1
2017	52.1
2018	50.7
2019	49.2
2020	49.9
2021	49.3
2022	48.9