Year	% (national estimate)
1990	51.724
1991	50.068
1992	47.158
1993	45.034
1994	47.211
1995	42.278
1996	39.539
1997	36.007
1998	34.889
1999	28.851
2000	29.585
2001	27.552
2002	25.405
2003	28.837
2004	29.644
2005	30.716
2006	31.397
2007	34.106
2008	35.934
2009	28.343
2010	25.338
2011	31.078
2012	32.272
2013	32.374
2014	33.335
2015	34.99
2016	36.395
2017	38.649
2018	40.628
2019	38.369
2020	34.211
2021	33.549
2022	36.506
2023	36.081