Year	Per 100 People
1975	0.53922
1976	0.5272
1977	0.53033
1978	0.58347
1979	0.75496
1980	0.78689
1981	0.82965
1982	0.84295
1983	0.87725
1984	1.03726
1985	1.0722
1986	1.1366
1987	1.19464
1988	1.42153
1989	1.63454
1990	1.77663
1991	1.85163
1992	1.99608
1993	2.16942
1994	2.36241
1995	2.81691
1996	3.24201
1997	3.87457
1998	4.02933
1999	4.39181
2000	4.57848
2001	4.62721
2002	4.69896
2003	4.75417
2004	5.37626
2005	6.69539
2006	9.4824
2007	10.65449
2008	10.48907
2009	8.91516
2010	8.21742
2011	7.35525
2012	7.17766
2013	7.15073
2014	5.98622
2015	5.54717
2016	4.86048
2017	5.30063