Year	% of population
2000	7.7
2001	8.5
2002	9.2
2003	9.9
2004	16.8
2005	11.3
2006	12.2
2007	13
2008	12.1
2009	14.6
2010	11.5
2011	14.2
2012	17.2
2013	13.5
2014	18.8
2015	19.7
2016	20.3
2017	23.4
2018	26.1
2019	22.7
2020	26.3
2021	27.5
2022	29.4