Year	Per 100 People
1975	10.12377
1976	11.2804
1977	13.23718
1978	14.38554
1979	15.52712
1980	16.2609
1981	18.56964
1982	18.89435
1983	19.2087
1984	19.88997
1985	20.53666
1986	21.13636
1987	21.69859
1988	22.03922
1989	22.52317
1990	23.2695
1991	24.2735
1992	24.90094
1993	26.88309
1994	26.22732
1995	28.08497
1996	29.82058
1997	30.16808
1998	30.54037
1999	30.37789
2000	30.81555
2001	30.59987
2002	30.06274
2003	28.35719
2004	28.54306
2005	32.46445
2006	29.54221
2007	29.29442
2008	27.29662
2009	26.18038
2010	25.1127
2011	24.67602
2012	23.04234
2013	20.72733
2014	19.84004
2015	17.86554
2016	18.4184
2017	17.54641