Year	Per 100 People
1960	0.81678
1970	0.8289
1975	0.88038
1976	0.88054
1977	0.88236
1978	0.89038
1979	0.91104
1981	0.95098
1982	1.02935
1983	1.22572
1984	1.31087
1985	1.77774
1986	2.08583
1987	2.1068
1988	2.20107
1989	2.48949
1990	2.79046
1991	3.09184
1992	3.37747
1993	3.64699
1994	3.93013
1995	4.26311
1996	4.65853
1997	5.21942
1998	5.89438
1999	6.82878
2000	7.84425
2001	9.39938
2002	10.73805
2003	11.80782
2004	12.55493
2005	13.5405
2006	13.8278
2007	14.11772
2008	14.6411
2009	12.50537
2010	11.4355
2011	10.14497
2012	9.74511
2013	7.59502
2014	6.87914
2015	6.64881
2016	6.39391
2017	6.77051