Year	% (national estimate)
1979	41.19542246479677
1980	41.260985123309126
1982	42.25216825339988
1983	41.87779798749998
1984	42.69984467874973
1985	43.9483968802642
1986	43.50834423735187
1987	44.23404267049054
1988	44.88984226790578
1989	45.726399039026866
1990	46.64826689779671
1991	46.8178385998928
1992	46.769748640853095
1993	46.50899642636802
1994	46.84070117690131
1995	47.07930162810723
1996	47.30617296857759
1997	47.67233870022476
1998	47.85177611282945
1999	48.42155167905828
2000	48.779006027475056
2001	48.87742703375879
2002	49.00644451175037
2003	49.14721741904083
2004	49.339572689813394
2005	49.84599526736727
2006	50.13593198026066
2007	50.56133750488066
2008	50.80917455634689
2009	49.95407545144219
2010	49.409929424870754
2011	49.453186272763055
2012	49.600717541384405
2013	49.77563092195943
2014	50.190906687742654
2015	50.83579724667947
2016	51.165578958924215
2017	51.715997494819554
2018	52.295584544721564
2019	52.560803398660525
2020	50.73130444379675
2021	51.60044098216644
2022	53.188494627348426
2023	53.12811826536656