Year	% (national estimate)
1992	80.33436595803965
1995	79.39529304767063
1996	78.39923491553492
1997	77.26839764699169
1998	77.14615354846549
1999	77.54660644600645
2000	78.22957194065265
2001	78.4691788472806
2002	77.7149607350673
2003	77.30064941536136
2004	76.80552887456929
2005	76.35083422658698
2006	76.20804045017692
2007	75.70376670080786
2008	75.42796112238902
2009	75.71147895420796
2010	75.54606177000068
2011	75.68157524258858
2012	75.89472895017973
2013	75.82358292566862
2014	75.91770517783291
2015	75.77647653561607
2016	75.64971079412838
2017	75.80329133975687
2018	75.75102335008503
2019	75.39324210664802
2020	74.97641960034873
2021	76.30257020845234
2022	77.37273462823748
2023	77.22286467878264