Year	% (national estimate)
1979	55.22404525442809
1980	54.951298472066576
1982	55.25151096881013
1983	54.764435373784295
1984	55.36150816850944
1985	56.06021111290373
1986	55.48085281339431
1987	55.932884056172874
1988	56.490585760085125
1989	57.12431743329049
1990	57.652252081012215
1991	57.3198888244907
1992	57.01077148056855
1993	56.45817499258354
1994	56.52583316261614
1995	56.696319243043696
1996	56.72220410466784
1997	56.85290518651714
1998	57.024797723253315
1999	57.38009194001256
2000	57.60087885514571
2001	57.46152601336417
2002	57.33980695699463
2003	57.22600057661083
2004	57.164101784042145
2005	57.5583938044013
2006	57.85465985727233
2007	58.179412233208936
2008	58.13673861654873
2009	56.52208123735157
2010	56.15130455281458
2011	56.2071581398503
2012	56.34814483757819
2013	56.345600343661935
2014	56.390150647866086
2015	56.936141602151196
2016	57.271691424406704
2017	57.75168434212601
2018	58.27788045141303
2019	58.465327183972654
2020	56.51403668427746
2021	57.267221197890194
2022	58.78672892722325
2023	58.550766859312375