Year	Per 100 People
1960	1.26625
1965	4.07426
1970	7.39631
1975	7.48116
1976	8.22614
1977	9.37279
1978	9.42252
1979	10.71535
1980	13.67445
1981	16.60326
1982	18.7162
1983	19.51667
1984	18.98728
1985	18.72933
1986	18.66676
1987	18.34394
1988	18.75082
1989	19.25065
1990	19.32458
1991	19.82847
1992	21.29634
1993	21.99112
1994	22.82925
1995	23.89713
1996	25.56232
1997	26.54319
1998	27.34371
1999	27.20253
2000	27.04709
2001	27.14375
2002	27.33935
2003	26.7952
2004	25.15316
2005	23.74781
2006	22.59809
2007	19.95304
2008	19.13604
2009	18.10068
2010	15.1713
2011	15.82948
2012	18.6961
2013	18.33321
2014	17.587
2015	18.53233
2016	18.17835
2017	16.70609