Year	Per 100 People
1975	2.89367
1976	3.05011
1977	3.42286
1978	3.67955
1979	3.95747
1980	4.19073
1981	4.45166
1982	4.54713
1983	5.78073
1984	7.02769
1985	7.44152
1986	7.93463
1987	8.07994
1988	8.19028
1989	8.48503
1990	9.00013
1991	9.76143
1992	10.29466
1993	10.98272
1994	11.58781
1995	12.20353
1996	12.63099
1997	14.01194
1998	14.58272
1999	15.17035
2000	15.94191
2001	16.19416
2002	16.28837
2003	16.34441
2004	16.55268
2005	16.24545
2006	16.16079
2007	16.08774
2008	16.11187
2009	16.08604
2010	16.14836
2011	15.79886
2012	16.0962
2013	15.65617
2014	15.49474
2015	16.61509
2016	15.94468
2017	15.80222