Year	% of population
1996	14.5
1997	18.5896263122559
1998	19.578254699707
1999	20.5620422363281
2000	21.5
2001	21.9
2002	23.4
2003	24.3
2004	25.2
2005	26.1
2006	27.9
2007	28
2008	29
2009	30
2010	34.2
2011	36.9
2012	38.4
2013	34.7
2014	34.1
2015	29.6
2016	37
2017	34.5
2018	39
2019	40
2020	41
2021	42
2022	56.5