Year	% (national estimate)
1964	14.118030648842517
1973	16.202387720295622
1978	16.29919393077288
1979	16.36973623322536
1980	16.005364926791106
1981	16.368165104969755
1985	16.502463054187192
1987	30.454042081949062
1989	31.598843673560157
1994	21.867555979037636
1999	31.59325720500272
2000	51.877133105802045
2002	52.79642058165548
2003	54.314686572533496
2004	49.46396942295143
2006	53.68504471866863
2010	51.95817608117306
2011	47.996853134349706
2012	52.28999747468951
2013	48.66991744315164
2014	48.587922485448054
2015	45.978915484458746
2016	47.820847799372444
2017	45.98231043543543
2018	46.042436945105145
2019	45.22742215049907
2021	50.492596444891134
2022	50.16065518324355