Year	% (national estimate)
1983	40.5403288482671
1984	41.65547249458554
1985	41.377221292475404
1986	39.96794769642454
1987	40.62221047801104
1988	40.78600180699735
1989	41.163909266599724
1990	41.87548478773325
1991	40.54215670338728
1992	38.43966838595358
1993	35.47881676330131
1994	34.28863632602302
1995	33.49709107807913
1996	32.51866127026162
1997	32.442680991987224
1998	33.70675668443141
1999	34.98521331105291
2000	36.101284990988056
2001	36.62489468397475
2002	36.41457530668988
2003	35.99624148730467
2004	35.38869769731832
2005	34.87022510814618
2006	35.553574673837026
2007	36.521795567787095
2008	36.37774036087474
2009	33.778707319803644
2010	32.611013167864485
2011	32.00857136361193
2012	30.852044032609594
2013	30.635618497501202
2014	30.27110249131392
2015	30.444784393111792
2016	30.97938228326588
2017	31.928661562464384
2018	32.81827829162287
2019	33.38065361869511
2020	31.30715523724731
2021	33.639390997649905
2022	35.637105617162725
2023	36.572330078426035