Year	% (national estimate)
1983	54.49041926519714
1984	55.25750008507012
1985	55.88904755144892
1986	55.379862939938604
1987	55.83893588171448
1988	56.38115145377439
1989	57.04209759479249
1990	57.411491902759735
1991	57.22284397742898
1992	58.16433801087019
1993	57.49486870430538
1994	56.99170524381275
1995	57.097398559936
1996	56.765027276019985
1997	56.51015984527656
1998	56.2571287153099
1999	56.7506074991272
2000	56.99215328480083
2001	56.95867565543548
2002	56.691289295797965
2003	56.71674006290614
2004	56.870489140448356
2005	57.3235140968257
2006	57.68430634467705
2007	58.168621588010154
2008	58.199645681356884
2009	56.743603080404064
2010	56.62341683776627
2011	56.813611619675946
2012	56.7405880881979
2013	56.790842249373284
2014	57.187560044380156
2015	57.48916486481505
2016	58.17257492162903
2017	57.92370243220768
2018	58.389456693790684
2019	58.722950330406825
2020	56.91098238245195
2021	57.66488469778217
2022	58.72179590583412
2023	58.58384293823831