Year	% (national estimate)
1979	57.15006059786327
1980	57.432527406130546
1981	57.30198036050039
1982	56.49439130804184
1983	56.67277178082906
1984	57.472242918112904
1985	57.37967351914409
1986	57.52848071699432
1987	57.558121890515054
1988	57.09820506824279
1989	55.83495888597619
1990	56.55639690699932
1991	55.702520205795
1992	54.77249816891258
1993	54.01565547089243
1994	53.79460363234076
1995	52.87143876822661
1996	52.84953709367197
1997	52.491260233700295
1998	52.809456318421276
1999	52.4675418003542
2000	53.03768338428312
2001	51.8243518761392
2002	51.69322754499491
2003	50.925087997879096
2004	51.44579078878947
2005	51.238291598150255
2006	51.13745570291745
2007	50.615975812489346
2008	50.24887988433792
2009	49.13231996316953
2010	48.17706178682122
2011	47.917395885302376
2012	47.74799352406618
2013	47.92755791442013
2014	47.506900775098494
2015	47.52895954091693
2016	47.65293433649724
2017	47.79788733263918
2018	47.96377019514232
2019	48.49242298855474
2020	46.87513357373995
2021	48.19876490757411
2022	49.67061434188294
2023	50.38854373585077