Year	Per 100 People
1960	20.59952
1965	25.14599
1970	31.52678
1975	38.85979
1976	39.69959
1977	40.98606
1978	42.34731
1979	43.68482
1980	45.03768
1981	46.31183
1982	47.46475
1983	48.53396
1984	49.62673
1985	50.75763
1986	52.07033
1987	53.57729
1988	55.27416
1989	57.17506
1990	59.06766
1991	60.53418
1992	61.40294
1993	61.8988
1994	61.16126
1995	63.83108
1996	64.73429
1997	66.10484
1998	68.64249
1999	70.96765
2000	73.05079
2001	74.74272
2002	74.37372
2003	73.00508
2004	71.50229
2005	69.49422
2006	67.12298
2007	65.17131
2008	63.14165
2009	66.32678
2010	62.66332
2011	61.77188
2012	58.79202
2013	56.47984
2014	53.15792
2015	49.761
2016	45.86281
2017	43.3282