Year	% of population
2000	8.3
2001	8.8
2002	9.4
2003	10
2004	10.6
2005	11.3
2006	12.25
2007	13.1
2008	14.2
2009	15.5
2010	16.9
2011	18.5
2012	20.3
2013	21.9
2014	24
2015	26
2016	27.7
2017	30
2018	31.8
2019	33.9
2020	35.9
2021	37.7
2022	39.65