Year	Per 100 People
1970	1.60373
1975	1.85766
1976	1.80339
1977	1.85869
1978	2.26891
1979	3.02069
1980	3.28087
1981	4.94089
1982	6.27982
1983	6.72154
1984	7.1283
1985	6.86861
1986	6.90285
1987	6.91178
1988	7.05653
1989	7.13814
1990	7.55812
1991	8.69294
1992	9.0246
1993	9.04087
1994	9.15103
1995	9.17713
1996	9.38784
1997	9.62314
1998	10.89924
1999	13.33462
2000	14.27801
2001	15.17549
2002	15.59825
2003	15.5283
2004	15.90749
2005	16.07988
2006	16.07516
2007	15.82413
2008	15.80524
2009	15.64429
2010	15.18923
2011	16.40752
2012	16.50885
2013	16.49625
2014	11.76949
2015	11.8734
2016	11.26991
2017	10.98831