Year	% (national estimate)
1990	43.448
1992	47.77
1994	44.861
1996	46.831
1997	45.199
1998	43.326
1999	39.312
2000	37.504
2001	36.326
2002	35.697
2003	35.043
2004	34.764
2005	34.499
2006	35.646
2007	35.97
2008	37.435
2009	34.15
2010	37.06
2011	37.951
2012	36.789
2013	36.016
2014	36.1
2015	36.245
2016	34.6
2017	33.212
2018	31.872
2019	29.219
2020	23.507
2021	24.757
2022	27.606
2023	26.881