Year	Per 100 People
1960	8.50039
1965	11.11792
1970	13.94846
1975	18.93203
1976	19.81668
1977	20.88279
1978	22.14132
1979	23.51239
1980	24.74409
1981	26.18372
1982	27.52432
1983	28.47159
1984	29.52611
1985	30.57928
1986	32.50387
1987	33.86737
1988	35.39645
1989	37.19014
1990	39.1007
1991	40.79978
1992	42.31295
1993	43.44141
1994	44.73714
1995	45.96452
1996	45.2935
1997	46.63863
1998	47.43929
1999	48.84019
2000	48.98274
2001	49.73044
2002	47.57988
2003	46.78938
2004	45.81056
2005	45.4597
2006	44.51971
2007	45.31069
2008	43.92282
2009	42.68835
2010	42.41604
2011	42.07952
2012	41.81676
2013	41.12895
2014	40.39941
2015	39.76555
2016	38.48309
2017	37.1987