Year	% (national estimate)
1990	37.885
1991	38.426
1992	38.54
1993	37.267
1994	37.496
1996	35.836
1997	34.376
1998	33.217
1999	33.012
2000	34.427
2001	32.276
2002	30.643
2003	30.169
2004	29.303
2005	26.844
2006	28.5
2007	30.02
2008	30.573
2009	30.524
2010	30.735
2011	30.056
2012	32.129
2013	31.246
2014	30.402
2015	30.612
2016	31.006
2017	32.153
2018	31.925
2019	34.75
2020	33.347
2021	33.105
2022	32.733