Year	% (national estimate)
1962	61.16
1972	77.98
1983	72.1
1984	39.71
1987	75.56
1989	75.25
1990	71.19
1991	72.35
1992	71.81
1993	70.96
1994	70.86
1995	65.03
2000	63.02
2001	67.263
2002	64.072
2003	65.373
2004	61.019
2005	58.466
2006	55.764
2007	52.216
2008	49.48
2009	48.587
2010	48.867
2011	48.83
2012	49.339
2013	51.101
2014	52.125
2015	52.494
2016	51.024
2017	50.28
2018	50.235
2019	49.749
2020	74.286
2021	35.556
2022	41.583