Year	% (national estimate)
1981	15.59
1985	30.23
1994	29.31
1995	29.16
1996	29.78
1997	30.64
1998	35.55
1999	33.6
2001	28.2
2002	29.2
2005	27.2
2009	32.17
2010	31.78
2011	31.832
2012	30.89
2013	32.045
2014	31.459
2015	33.15
2016	33.37
2017	34.251
2018	31.177
2019	31.902
2020	29.34
2021	29.282
2022	29.995