Year	% (national estimate)
1989	51.77
1992	50.886
1993	48.326
1994	46.246
1995	45.999
1996	43.36
1997	40.172
1998	37.552
1999	40.745
2000	39.726
2001	36.724
2002	36.95
2003	35.736
2004	35.597
2005	35.835
2006	35.534
2007	36.013
2008	37.426
2009	38.317
2010	36.737
2011	36.86
2012	35.114
2013	35.493
2014	34.359
2015	33.799
2016	33.274
2017	31.35
2018	30.567
2019	29.555
2020	28.672
2021	28.559
2022	26.19
2023	26.129