Year	% (national estimate)
1983	36.131703238502645
1984	37.04306849734275
1985	37.326644965264144
1986	35.364746147840954
1987	36.30024577732019
1988	36.54708743576116
1989	37.09015728749939
1990	37.83972211801186
1991	36.65371428401767
1992	34.74859236955005
1993	32.16416284149525
1994	31.329760103777417
1995	30.282327695415255
1996	29.183242750489534
1997	28.935177178787225
1998	30.109932169920395
1999	31.3818006658924
2000	32.54370272322402
2001	33.01740778762181
2002	32.79979822755754
2003	32.76323045214996
2004	32.179451572025556
2005	31.60290454354769
2006	32.14618949456337
2007	33.36580853568851
2008	33.26812538888543
2009	31.742372127616953
2010	30.431049556317934
2011	30.045584640186966
2012	28.92906005693741
2013	28.775702985207214
2014	28.440093708123747
2015	28.758375263180756
2016	29.29523242150703
2017	30.281729392215155
2018	30.82062326652662
2019	31.25425312252396
2020	29.041928125948992
2021	31.600827127619358
2022	33.72897457307717
2023	34.623410597398276