Year	Per 100 People
1960	0.07626
1965	0.20094
1970	0.33065
1975	0.56912
1976	0.58285
1977	0.61664
1978	0.63606
1979	0.66379
1980	0.71198
1981	0.75231
1982	0.78874
1983	0.84945
1984	0.87545
1985	0.8894
1986	0.95785
1987	1.15406
1988	1.3992
1989	1.65681
1990	1.91355
1991	2.30157
1992	2.50558
1993	2.90943
1994	3.29155
1995	3.80302
1996	4.50039
1997	5.22656
1998	6.11011
1999	7.28406
2000	7.86304
2001	8.44219
2002	8.32353
2003	7.28239
2004	7.2034
2005	7.35312
2006	7.00729
2007	7.15342
2008	7.31019
2009	6.94092
2010	6.8204
2011	7.29173
2012	7.68137
2013	8.1825
2014	7.80403
2015	7.26463
2016	6.3158
2017	6.16178