Year	% (national estimate)
1983	33.863617116568875
1984	34.74005477365103
1986	35.166182737705086
1987	35.523757472802245
1988	36.0513006546706
1989	36.57594133164944
1990	38.866259481662446
1991	39.68961201900577
1992	40.82862333840502
1993	40.37106777540759
1994	40.22235685222437
1995	41.18690107733226
1996	40.342688517374356
1997	40.660275076459335
1998	41.162076878657096
1999	41.941586239839324
2000	42.27983450795259
2001	42.77612779413918
2002	42.835527566468585
2003	43.18019309946604
2004	43.23952633478681
2005	43.675453273353135
2006	44.59317434012996
2007	45.537363596416895
2008	46.05333812748816
2009	45.683319505512216
2010	45.499844235893775
2011	45.73968859257722
2012	45.66296280213521
2013	45.59377018500386
2014	45.97886306438165
2015	46.4096247904527
2016	47.092198304790834
2017	47.817304133926235
2018	48.35536305709585
2019	48.876223102649725
2020	47.93190340143789
2021	48.50663923311245
2022	49.61787173683191
2023	49.02066327106829