Year	% (national estimate)
1992	37.083
1993	32.747
1994	32.196
1995	35.339
1996	30.805
1997	32.411
1998	37.288
1999	38.567
2000	36.988
2001	34.404
2002	31.653
2003	29.856
2004	26.331
2005	24.37
2006	24.574
2007	24.401
2008	23.294
2009	20.018
2010	19.891
2011	19.715
2012	19.79
2013	23.048
2014	26.414
2015	28.101
2016	31.461
2017	32.934
2018	33.434
2019	32.796
2020	31.105
2021	30.88
2022	30.187
2023	30.721