Year	% (national estimate)
1991	84.114
1992	84.201
1993	84.293
1994	82.844
1995	79.858
1996	81.439
1997	83.665
1998	83.478
1999	83.671
2000	82.789
2001	82.292
2002	77.973
2003	77.653
2004	77.457
2005	77.611
2006	77.998
2007	77.574
2008	76.918
2009	74.771
2010	74.468
2011	74.374
2012	74.904
2013	74.631
2014	74.511
2015	74.702
2016	74.765
2017	75.05
2018	74.963
2019	74.572
2020	68.291
2021	72.73
2022	73.855
2023	74.259