Year	Per 100 People
1960	1.22989
1965	2.7452
1970	5.0886
1975	8.68344
1976	9.4564
1977	9.85279
1978	10.26392
1979	10.69492
1980	11.4405
1981	11.79585
1982	12.67804
1983	12.90422
1984	12.69609
1985	12.75922
1986	12.82318
1987	13.11636
1988	13.81986
1989	14.82342
1990	15.78413
1991	15.81349
1992	18.02844
1993	20.14454
1994	22.39989
1995	23.73494
1996	24.01369
1997	23.9973
1998	23.26829
1999	23.28194
2000	22.77552
2001	22.39614
2002	22.47801
2003	22.4471
2004	22.50846
2005	22.17346
2006	21.74699
2007	21.49943
2008	19.60405
2009	18.74808
2010	17.325
2011	16.12936
2012	15.01963
2013	14.11744
2014	13.06032
2015	12.19576
2016	9.95005
2017	13.10476