Year	% (national estimate)
1983	44.795
1984	43.627
1985	40.623
1986	40.242
1987	38.881
1988	36.814
1989	37.764
1990	37.345
1991	35.202
1992	33.526
1993	33.857
1994	34.449
1995	34.258
1996	33.3
1997	35.64
1998	39.708
1999	42.83
2000	43.512
2001	42.225
2002	41.618
2003	42.328
2004	41.357
2005	44.099
2006	44.438
2007	59.133
2008	55.635
2009	47.755
2010	40.886
2011	38.16
2012	37.141
2013	37.146
2014	36.741
2015	37.314
2016	41.743
2017	39.75
2018	39.346
2019	41.035
2020	36.513
2021	43.311
2022	48.155
2023	48.456