Year	% (national estimate)
1962	18.811352966282545
1974	19.713758079409047
1980	35.59162549988238
1981	35.64601769911505
1982	24.92350841407445
1988	41.81238034460753
1989	41.7613273771538
1990	34.34984142473774
1996	60.70980687233509
1997	60.44582043343654
1998	63.52454025088296
2000	56.36102835705616
2001	64.90541422048271
2002	66.01290963257199
2003	60.0783901926787
2004	63.89251365327922
2005	63.03501473602504
2006	63.09589237496716
2007	63.440375906899746
2008	63.916339100939226
2009	63.12805325638495
2010	61.810564616350426
2011	61.272866149683466
2012	62.33883561555438
2013	62.76338694172361
2014	61.25515954659885
2015	65.13955173533896
2016	69.11293328363772
2017	69.9048988853207
2018	68.91027662499842
2019	69.5950171667794
2020	66.93247534913392
2021	68.59611956493657
2022	69.6281179727815
2023	68.46224499036234