Year	% (national estimate)
1983	44.79941562094241
1984	45.93068180022483
1985	46.33705197428014
1986	45.71406949735453
1987	46.32726863842465
1988	46.68355732830483
1989	47.338577901423704
1990	45.67097399628284
1991	43.76814432593435
1992	41.94935824042212
1993	40.83359010622068
1994	40.75958875317845
1995	40.34227863736279
1996	39.84838917013761
1997	39.79925201450309
1998	40.308849880714014
1999	40.49594145215659
2000	40.792267984812014
2001	39.96170503210626
2002	39.216298576337394
2003	38.47351014596797
2004	38.032122704920305
2005	38.371566457709626
2006	39.00649625152699
2007	38.6580386618799
2008	38.17541640820278
2009	36.503779802861246
2010	35.705951317141256
2011	35.66343015490319
2012	35.634053187501145
2013	35.88389816044144
2014	36.228442101019574
2015	36.83469580699849
2016	37.33239996040591
2017	37.826253160168946
2018	38.32986186982437
2019	38.83935528972284
2020	35.19850028009909
2021	37.94179632034268
2022	39.40691566659647
2023	40.3589531437024