Year	% (national estimate)
1991	66.43117788040377
1992	67.09697659658526
1993	67.33976833551529
1994	68.27074109093408
1995	68.72849137982844
1996	69.05290439962116
1997	69.45645037328728
1998	69.64807353665098
1999	70.21015357168226
2000	70.67063204208588
2001	70.64232964112489
2002	70.9960254896364
2003	71.47615171738035
2004	71.6751049505876
2005	72.02783878239718
2006	72.73065919361783
2007	72.7692746091264
2008	73.14262185091945
2009	74.01728568796973
2010	74.25191253435723
2011	74.65582278958196
2012	74.98703749568396
2013	75.32089244543847
2014	75.51538162155869
2015	75.66997921970288
2016	76.00603248324863
2017	76.34552520907643
2018	76.62635209016429
2019	77.24324552336967
2020	77.10474648051797
2021	77.42877616760819
2022	78.08441879993678
2023	78.50526908634467