Year	% (national estimate)
1983	66.275
1984	66.931
1985	66.634
1986	67.038
1987	66.547
1988	67.308
1989	67.916
1990	69.062
1991	68.686
1992	67.137
1993	65.418
1994	64.165
1995	63.735
1996	62.539
1997	61.535
1998	61.335
1999	61.61
2000	61.563
2001	61.053
2002	59.979
2003	58.713
2004	57.453
2005	58.64
2006	59.731
2007	60.308
2008	61.665
2009	60.837
2010	61.443
2011	62.189
2012	62.776
2013	62.718
2014	62.807
2015	62.691
2016	63.674
2017	63.914
2018	64.302
2019	65.047
2020	63.083
2021	63.334
2022	64.298
2023	64.533