Year	% (national estimate)
1992	74.134
1993	71.439
1994	67.378
1995	65.739
1996	64.203
1997	60.893
1998	58.721
1999	62.054
2000	63.794
2001	63.549
2002	64.505
2003	63.981
2004	64.901
2005	65.864
2006	65.996
2007	67.772
2008	68.596
2009	66.869
2010	68.02
2011	69.209
2012	70.375
2013	70.39
2014	70.994
2015	71.133
2016	71.569
2017	67.512
2018	67.818
2019	67.266
2020	66.095
2021	67.261
2022	67.672
2023	68.407