Year	Per 100 People
1960	1.24494
1970	1.04717
1977	1.88463
1978	1.99177
1979	2.27669
1980	2.54938
1981	2.91082
1982	3.36264
1983	3.74887
1984	4.08808
1985	5.10614
1986	5.18128
1987	6.49183
1988	6.85307
1989	7.01886
1990	6.90286
1991	7.06582
1992	7.01238
1993	6.92423
1994	7.20192
1995	6.93229
1996	7.32612
1997	8.36736
1998	10.36697
1999	11.27187
2000	12.14941
2001	12.70824
2002	12.75674
2003	11.536
2004	11.522
2005	10.99034
2006	10.34675
2007	9.02604
2008	7.99698
2009	7.34833
2010	6.75999
2011	6.14378
2012	5.43551
2013	4.49768
2014	4.26234
2015	4.02801
2016	4.27369