Year	% (national estimate)
1989	53.31
1990	52.579
1991	51.835
1992	50.923
1993	50.529
1994	53.248
1995	49.127
1996	46.94
1997	44.274
1998	40.984
1999	37.015
2000	37.514
2001	36.254
2002	31.851
2003	39.423
2004	39.877
2005	36.199
2006	35.728
2007	37.936
2008	40.844
2009	39.035
2010	37.774
2011	40.036
2012	40.778
2013	39.809
2014	39.201
2015	40.854
2016	42.386
2017	44.014
2018	46.219
2019	43.431
2020	41.971
2021	40.28
2022	44.826
2023	43.629