Year	% (national estimate)
1986	68.499
1987	67.447
1988	62.207
1989	58.315
1990	58.568
1991	54.381
1992	52.961
1993	53.117
1994	55.818
1995	58.873
1996	58.78
1997	57.665
1998	55.196
1999	54.022
2000	54.206
2001	55.348
2002	56.16
2003	55.864
2004	56.187
2005	56.276
2006	58.015
2007	57.993
2008	55.823
2009	51.089
2010	49.405
2011	49.183
2012	48.613
2013	49.038
2014	51.584
2015	52.909
2016	53.997
2017	55.011
2018	56.206
2019	56.366
2020	55.06
2021	58.052
2022	61.188
2023	61.28