Year	% (national estimate)
1989	49.98
1997	43.34
1998	44.143
1999	43.065
2000	37.314
2001	33
2002	31.726
2003	32.248
2004	25.78
2005	25.184
2006	26.292
2007	27.06
2008	30.021
2009	29.312
2010	28.424
2011	28.164
2012	29.293
2013	31.514
2014	34.22
2015	33.827
2016	35.341
2017	35.046
2018	36.484
2019	37.318
2020	36.588
2021	36.303
2022	36.304
2023	35.772