Year	Per 100 People
1960	12.69781
1965	15.64252
1970	19.15089
1975	22.80172
1976	23.73447
1977	24.83724
1978	25.97567
1979	27.35664
1980	29.30163
1981	31.658
1982	34.67001
1983	37.68122
1984	40.05064
1985	42.32149
1986	44.64544
1987	46.54155
1988	47.93698
1989	48.98697
1990	50.2036
1991	51.48748
1992	52.84541
1993	54.08734
1994	55.14077
1995	55.96526
1996	56.54181
1997	62.77908
1998	55.64942
1999	54.67139
2000	53.36306
2001	51.68651
2002	50.96589
2003	48.92913
2004	47.41904
2005	45.51948
2006	43.97659
2007	42.1253
2008	39.81044
2009	36.68649
2010	33.71758
2011	30.7666
2012	27.85343
2013	24.35835
2014	21.02731
2015	18.16423
2016	15.3608
2017	14.04577