Year	Per 100 People
1960	1.82559
1965	2.19764
1970	2.4347
1975	2.65241
1976	2.69541
1977	2.73917
1978	2.78276
1979	2.82478
1980	2.86371
1981	3.19067
1982	3.59724
1983	3.9775
1984	3.95993
1985	3.91883
1986	3.85391
1987	3.7721
1988	3.74357
1989	3.72577
1990	3.7464
1991	3.88466
1992	4.02809
1993	4.27883
1994	4.34326
1995	4.74211
1996	5.01316
1997	5.67961
1998	5.84773
1999	5.82296
2000	5.80101
2001	6.07149
2002	6.18776
2003	6.41217
2004	6.36737
2005	6.83974
2006	6.62357
2007	6.64311
2008	6.90096
2009	6.95691
2010	7.22737
2011	7.17898
2012	7.56422
2013	7.92275
2014	7.70112
2015	7.52432
2016	7.57559
2017	7.62197