Year	% (national estimate)
1990	65.957
1991	61.133
1992	53.984
1993	44.13
1994	42.74
1995	38.22
1996	33.905
1997	31.426
1998	31.886
1999	35.015
2000	37.095
2001	46.975
2002	44.282
2003	44.072
2004	39.928
2005	39.741
2006	40.435
2007	42.312
2008	42.085
2009	38.881
2010	39.16
2011	41.02
2012	41.56
2013	42.86
2014	44.011
2015	45.458
2016	45.946
2017	45.972
2018	46.428
2019	45.121
2020	40.059
2021	41.647
2022	43.299
2023	44.807