Year	% (national estimate)
1979	61.37483681197594
1980	61.71892452077816
1981	61.747949916863774
1982	60.27132673978469
1983	60.291942043034716
1984	60.974789638906515
1985	60.52670829445018
1986	60.5324682075217
1987	60.17579388324934
1988	59.56585560778668
1989	58.02865452219349
1990	58.94053905542615
1991	58.03857200687496
1992	57.153544445634004
1993	56.49579532077108
1994	56.17256765371129
1995	55.016950011537084
1996	55.12553065618158
1997	54.7243620552807
1998	54.847164642003094
1999	54.78996221350092
2000	55.179981249543836
2001	53.87924056250737
2002	53.72545525742071
2003	52.88287788771265
2004	53.298320784216635
2005	52.95470328647758
2006	53.013501379912526
2007	52.36335773062849
2008	52.08419468844472
2009	50.4763194598365
2010	49.512529116724785
2011	49.130318357663405
2012	48.98772203572076
2013	49.08170750393083
2014	48.79130021435613
2015	48.669869979384075
2016	48.75648500437813
2017	48.83742928650534
2018	48.892412952542486
2019	49.39298228474131
2020	47.84518373279028
2021	49.0114664341978
2022	50.44252365511978
2023	51.05694461234205