Year	% (national estimate)
1991	46.87
1993	29.86
1994	36.36
1995	37.58
1996	40.68
1997	42.372
1998	41.569
1999	38.962
2000	33.589
2001	31.7
2002	32.601
2003	28.894
2004	35.376
2005	36.262
2006	36.397
2007	35.393
2008	37.387
2009	35.797
2010	34.822
2011	32.312
2012	30.045
2013	30.171
2014	30.43
2015	31.693
2016	30.555
2017	34.929
2018	34.339
2019	32.964
2020	28.668
2021	31.04
2022	33.031
2023	31.102