Year	% (national estimate)
1962	56.58
1972	55.09
1982	53.08
1989	63.69
1990	59.25
1991	57.97
1992	60.39
1993	61.54
1994	62.75
1995	71.5
1996	65.2
1998	60.507
1999	55.109
2001	59.515
2002	62.452
2003	57.646
2004	61.467
2005	58.775
2006	58.966
2007	57.282
2008	58.58
2009	62.645
2010	56.991
2011	56.829
2012	59.006
2013	58.004
2014	56.041
2015	54.063
2016	57.667
2017	58.42
2018	58.55
2019	59.282
2020	56.132
2021	59.413
2022	55.918
2023	57.13