Year	% of population
2000	9.8
2001	10.8
2002	11.7
2003	12.8
2004	13.8
2005	14.8
2006	15.7
2007	16.6
2008	17.4
2009	18.4
2010	19
2011	19.7
2012	20.3
2013	21
2014	21.9
2015	22.8
2016	23.6
2017	24.3
2018	25.3
2019	26.4
2020	27.4
2021	28.6
2022	29.4