Year	Per 100 People
1960	0.29606
1965	0.27153
1970	0.25926
1975	0.29237
1976	0.29419
1977	0.29384
1978	0.29329
1979	0.31754
1980	0.32187
1981	0.32868
1982	0.32821
1983	0.32548
1984	0.3352
1985	0.34177
1986	0.37102
1987	0.39748
1988	0.40705
1989	0.49349
1990	0.58666
1991	0.62222
1992	0.7235
1993	0.77202
1994	0.84689
1995	0.93737
1996	1.05938
1997	1.26028
1998	1.48166
1999	1.71962
2000	2.08303
2001	2.34013
2002	2.16049
2003	2.14454
2004	2.23575
2005	2.36962
2006	2.44509
2007	2.26628
2008	1.94816
2009	2.22126
2010	2.64672
2011	2.60438
2012	2.48125
2013	2.43421
2014	2.14453
2015	2.00453
2016	1.85531
2017	1.8336