Year	% (national estimate)
1981	56.791838831677225
1983	55.83537015260324
1984	56.77572793072998
1985	56.57906212076068
1986	56.66093748088606
1987	56.99773819543889
1988	55.69540776463518
1989	55.86903903951222
1990	55.60899712051289
1991	54.87698506959947
1992	53.41966400634335
1993	52.823558043809584
1994	52.471599533482646
1995	51.789181210888856
1996	50.950964678333555
1997	49.948224509268435
1998	49.77373745989953
1999	50.433314794959664
2000	50.17457401099793
2001	49.557316907607195
2002	49.063698067584305
2003	48.10303397035755
2004	48.03974782981874
2005	47.812920168294596
2006	47.749110555623595
2007	47.51716773121285
2008	47.72343845533822
2009	45.93590020719299
2010	45.94893934961242
2011	45.78577221064904
2012	45.534542527243985
2013	44.92580596969069
2014	45.727904084764596
2015	45.69677591360152
2016	45.88288762205962
2017	45.02346251071674
2018	45.12476954546456
2019	45.31441294380041
2020	43.856092995833215
2021	45.091994800075035
2022	45.67463996246321
2023	46.18373728019672