Year	% (national estimate)
1983	68.5764356984506
1984	69.11003031700874
1985	69.1186601524751
1986	68.40940390327827
1987	68.56252255124538
1988	68.95978153455287
1989	69.38533338141254
1990	69.42117270745015
1991	68.63678983362172
1992	68.83515073105704
1993	67.64434034756201
1994	66.98537874479086
1995	66.86668552754067
1996	66.45930543499915
1997	66.0360955262569
1998	65.6460467579183
1999	66.0511296080037
2000	66.20263436857589
2001	65.88922681025444
2002	65.3467640368501
2003	64.8815147489172
2004	64.94143624050979
2005	65.40560961923556
2006	65.8326738332101
2007	66.34086913682076
2008	66.29025428027397
2009	64.26611448973388
2010	63.609133593491755
2011	63.67676286874578
2012	64.0137122244882
2013	63.952317231775325
2014	64.32883148455046
2015	64.58789507429725
2016	64.83122773510553
2017	65.4029523892122
2018	65.80787808872599
2019	66.0066800081386
2020	63.974634898985954
2021	64.57694203859919
2022	65.4939932023736
2023	65.05039859968035