Year	Per 100 People
1960	0.85022
1965	1.06083
1970	1.25646
1975	1.69858
1976	1.75761
1977	1.8733
1978	2.02725
1979	2.21432
1980	2.68537
1981	3.29628
1982	3.49314
1983	3.68252
1984	4.04156
1985	4.13199
1986	4.13476
1987	4.10181
1988	4.07882
1989	4.04786
1990	3.98805
1991	3.91967
1992	3.89323
1993	4.18013
1994	4.92076
1995	6.68124
1996	8.1259
1997	8.64825
1998	9.46661
1999	9.99217
2000	10.20816
2001	10.83677
2002	12.26014
2003	13.84418
2004	14.92702
2005	15.86882
2006	17.14514
2007	17.58282
2008	17.87633
2009	18.58888
2010	19.35902
2011	20.55695
2012	20.83203
2013	22.35722
2014	18.89825
2015	18.89334
2016	18.79957
2017	14.9218