Year	% (national estimate)
1965	77.4248144772816
1975	86.2588904694168
1992	88.66556836902801
1997	82.42530755711776
2000	79.44954454881868
2001	81.86737643657901
2002	82.21281762825664
2003	80.68073298617992
2004	81.02310819485058
2005	80.10934088735723
2006	81.79732448554586
2007	81.59953238090326
2008	80.85405441584955
2009	80.54510322383811
2010	80.36880005383942
2011	81.0759743717471
2012	81.43815556463696
2013	81.39909141199941
2014	80.90024128463266
2015	80.91818030328278
2016	80.15136226034308
2017	80.29317809596394
2018	79.47202712521191
2019	79.2882147024504
2020	78.77948405899214
2021	79.08772835007498
2022	80.13405590416428
2023	80.046646292424