Year	% (national estimate)
1989	56.26
1996	49.07
1997	45.73
1998	45.095
1999	42.316
2000	38.439
2001	37.362
2002	37.825
2003	38.818
2004	36.933
2005	38.005
2006	40.859
2007	42.613
2008	42.848
2009	41.229
2010	39.743
2011	37.456
2012	40.143
2013	39.364
2014	40.405
2015	41.275
2016	39.684
2017	39.742
2018	37.71
2019	36.287
2020	34.83
2021	32.707
2022	36.123
2023	34.931