Year	% (national estimate)
1983	41.854
1984	48.298
1985	49.916
1986	51.725
1987	52.577
1988	53.728
1989	54.313
1990	56.038
1991	55.136
1992	52.725
1993	49.836
1994	48.407
1995	46.185
1996	43.037
1997	41.884
1998	42.456
1999	43.894
2000	43.59
2001	44.263
2002	43.819
2003	42.957
2004	39.836
2005	40.292
2006	42.204
2007	44.087
2008	44.421
2009	44.86
2010	44.069
2011	45.594
2012	44.378
2013	45.357
2014	44.516
2015	43.966
2016	44.39
2017	45.626
2018	45.347
2019	46.057
2020	44.555
2021	46.873
2022	48.418
2023	48.749