Year	% (national estimate)
1960	68.00975383186253
1970	77.56097560975608
1978	76.62185093329853
1988	76.67563930013459
1992	81.97653098643198
1993	82.04386694661227
1994	82.83301312840217
1995	82.53994020805432
1996	82.34085124338156
1997	76.20009108850766
1998	76.5762727453896
1999	77.09768509898839
2000	78.3400746733043
2001	78.80342413422107
2002	78.03258423404863
2003	77.69520923334838
2004	76.56911170820395
2005	76.13788061788824
2006	75.17908194404292
2007	74.84570636672736
2008	74.52538701662739
2009	74.74618690088303
2010	74.87507245014646
2011	74.81294425738871
2012	75.15444075373296
2013	75.09100202915164
2014	75.29406323708511
2015	75.37601531857068
2016	74.9780833294883
2017	74.71977979967888
2018	75.04756352031421
2019	74.47656417645075
2020	74.04441041347627
2021	76.05631668283222
2022	77.10219332887782
2023	77.6304397357029