Year	% (national estimate)
1989	55.73
1992	58.304
1993	56.578
1994	55.306
1995	54.667
1996	50.661
1997	46.173
1998	43.447
1999	49.483
2000	47.456
2001	44.843
2002	43.982
2003	42.526
2004	43.059
2005	42.491
2006	42.177
2007	42.732
2008	46.161
2009	45.801
2010	45.614
2011	45.775
2012	43.874
2013	44.097
2014	43.047
2015	41.872
2016	41.869
2017	39.224
2018	37.541
2019	36.506
2020	35.373
2021	34.728
2022	32.001
2023	32.089