Year	Cases per 100,000
1980	3.02091
1981	3.38182
1982	2.57273
1983	4.34364
1984	4.26455
1985	4.45545
1986	4.92636
1987	5.64727
1988	4.96818
1989	6.04909
1990	5.77
1991	5.82
1992	5.88
1993	5.94
1994	6
1995	6.06
1996	5.86
1997	5.67
1998	5.49
1999	5.32
2000	5.15
2001	5.01
2002	4.88
2003	4.75
2004	4.62
2005	4.5
2006	4.45
2007	4.4
2008	4.35
2009	4.31
2010	4.26
2011	4.31
2012	4.36
2013	4.41
2014	4.46
2015	4.51
2016	4.57