Year	% (national estimate)
1991	70.791
1992	70.606
1993	70.313
1994	70.771
1995	73.612
1996	73.133
1997	71.555
1998	73.069
1999	76.091
2000	77.674
2001	76.712
2002	76.183
2003	75.61
2004	74.695
2005	75.159
2006	75.375
2007	75.984
2008	75.019
2009	72.06
2010	71.609
2011	71.651
2012	72.712
2013	73.699
2014	74.892
2015	76.439
2016	77.318
2017	76.754
2018	75.941
2019	74.966
2020	71.03
2021	64.882
2022	68.305
2023	68.273