Year	% (national estimate)
1979	70.38954032978977
1980	69.70504242374528
1982	69.33607267935055
1983	68.69848025182935
1984	69.14069659818304
1985	69.2086331276874
1986	68.45056569036606
1987	68.60331337643663
1988	68.98248656401435
1989	69.39523399635677
1990	69.47100359740784
1991	68.6128977412393
1992	67.98010142420064
1993	67.13717378132148
1994	66.90592526201954
1995	66.99048242249712
1996	66.80825248574007
1997	66.66681487946774
1998	66.80451476659864
1999	66.94855623375632
2000	67.02853672461329
2001	66.62399592633214
2002	66.2172391237405
2003	65.82646831150619
2004	65.52585454643179
2005	65.77741411673772
2006	66.07596645103784
2007	66.27977678786267
2008	65.92486998933933
2009	63.50842070279041
2010	63.064433892479826
2011	63.062451380399736
2012	63.171583390294536
2013	62.946426759513784
2014	62.98302094541192
2015	63.43519087487426
2016	63.759321736440945
2017	64.15426379084145
2018	64.61975882716973
2019	64.73652507983947
2020	62.65118845157115
2021	63.279793240323954
2022	64.67261622510597
2023	64.25852380876574