Year	% (national estimate)
1980	40.170536845380056
1983	41.52375845715002
1984	42.55900756069802
1985	43.80950553247674
1986	43.37995955871407
1987	44.1038858981251
1988	44.22023120645051
1989	44.97135414291528
1990	45.509737941278495
1991	45.3023957437207
1992	45.346469641121224
1993	45.24650877463658
1994	45.43437006088442
1995	45.66749552920776
1996	45.75113968988351
1997	45.8357317119889
1998	45.97610723395909
1999	46.3460747748546
2000	46.5588180385941
2001	46.618109469726136
2002	46.38475012422791
2003	46.48077726365198
2004	46.418427161877176
2005	46.865609495233144
2006	47.55169322037099
2007	47.81403724602543
2008	47.96044330532628
2009	47.35071168149112
2010	47.21227441439865
2011	47.39487525447129
2012	47.553645698501114
2013	47.72041300093476
2014	47.97622026829127
2015	48.34206619795488
2016	48.82080624125235
2017	49.30150384524314
2018	49.78935292657071
2019	50.244492876346335
2020	47.99810937009335
2021	49.16639141584216
2022	50.54321144868198
2023	50.82410899976248