Year	% (national estimate)
1989	46.71
1997	35.63
1998	34.79
1999	37.592
2000	32.713
2001	27.922
2002	27.454
2003	28.806
2004	19.374
2005	20.591
2006	23.343
2007	22.346
2008	25.288
2009	25.85
2010	25.427
2011	24.084
2012	26.057
2013	27.017
2014	29.588
2015	30.781
2016	31.853
2017	32.168
2018	34.08
2019	35.645
2020	34.191
2021	34.342
2022	36.104
2023	35.492