Year	% (national estimate)
1992	47.581
1993	45.331
1994	42.569
1995	40.957
1996	37.969
1997	33.048
1998	29.553
1999	34.351
2000	34.602
2001	33.485
2002	34.204
2003	32.299
2004	32.595
2005	33.123
2006	32.525
2007	33.716
2008	35.963
2009	34.329
2010	34.184
2011	34.996
2012	33.695
2013	34.316
2014	33.438
2015	31.82
2016	31.466
2017	29.604
2018	28.34
2019	28.081
2020	26.65
2021	26.563
2022	24.928
2023	25.935