Year	Per 100 People
1975	0.17418
1976	0.1764
1977	0.17884
1978	0.18654
1979	0.19816
1980	0.19962
1981	0.20606
1982	0.23274
1983	0.2656
1984	0.28859
1985	0.29712
1986	0.31249
1987	0.32722
1988	0.32633
1989	0.33826
1990	0.3433
1991	0.34768
1992	0.44059
1993	0.44806
1994	0.44395
1995	0.48731
1996	0.51083
1997	0.53087
1998	0.64667
1999	0.63524
2000	0.62196
2001	0.6782
2002	0.68935
2003	0.58977
2004	0.58635
2005	0.57593
2006	0.73015
2007	1.02675
2008	1.35032
2009	2.24064
2010	2.70151
2011	3.25999
2012	3.49792
2013	3.68963
2014	5.1989
2015	4.59953
2016	4.48425
2017	2.90622