Year	% (national estimate)
1983	68.418
1984	68.676
1985	68
1986	68.574
1987	69.031
1988	67.952
1989	67.912
1990	66.939
1991	68.025
1992	67.601
1993	67.336
1994	65.649
1995	64.991
1996	63.771
1997	63.473
1998	63.326
1999	63.165
2000	64.877
2001	64.66
2002	65.17
2003	63.157
2004	62.52
2005	62.803
2006	58.229
2007	59.122
2008	61.373
2009	63.548
2010	63.312
2011	62.28
2012	62.722
2013	62.338
2014	62.458
2015	61.578
2016	60.804
2017	60.082
2018	60.534
2019	61.72
2020	60.29
2021	62.904
2022	62.179
2023	62.921