Year	% (national estimate)
1986	68.271
1987	67.665
1988	64.713
1989	61.784
1990	64.515
1991	63.46
1992	61.474
1993	60.625
1994	62.05
1995	62.982
1996	63.359
1997	63.735
1998	62.009
1999	59.244
2000	59.502
2001	59.727
2002	60.492
2003	59.482
2004	58.648
2005	59.162
2006	61.508
2007	61.946
2008	60.153
2009	58.888
2010	58.047
2011	57.026
2012	57.445
2013	56.033
2014	57.705
2015	59
2016	59.823
2017	61.025
2018	62.831
2019	63.281
2020	61.807
2021	64.256
2022	67.257
2023	68.023