Year	% (national estimate)
1986	51.956
1987	52.413
1988	51.112
1989	49.215
1990	49.937
1991	49.004
1992	48.767
1993	49.087
1994	50.752
1995	52.21
1996	53.603
1997	53.165
1998	52.641
1999	53.442
2000	53.966
2001	55.109
2002	55.758
2003	56.265
2004	57.081
2005	58.262
2006	58.717
2007	59.301
2008	59.42
2009	58.306
2010	57.686
2011	58.26
2012	57.969
2013	58.453
2014	59.503
2015	59.669
2016	61.061
2017	62.081
2018	62.784
2019	62.895
2020	61.927
2021	63.548
2022	64.534
2023	64.934