Year	Per 100,000 People
1981	27.8771
1982	32.2659
1985	22.3723
1986	23.2385
1987	19.0079
1988	29.9576
1989	39.5982
1990	37.1734
1991	46.1482
1992	44.3859
1993	37.7922
1994	39.4086
1995	38.7867
1996	0.2795
1997	0.1107
2001	0.1617
2007	14.954
2008	17.1094
2009	15.0148
2010	12.583
2011	13.4623
2012	12.6515
2013	9.4997
2014	8.8392
2015	8.9072
2016	7.7741