Year	Cases per 100,000
1990	4.36
1991	4.38
1992	4.5
1993	4.61
1994	4.7
1995	4.82
1996	4.72
1997	4.9
1998	5.04
1999	5.19
2000	5.37
2001	5.28
2002	5.23
2003	5.18
2004	5.04
2005	4.92
2006	4.77
2007	4.66
2008	4.57
2009	4.48
2010	4.39
2011	4.3
2012	4.22
2013	4.14
2014	4.06
2015	3.98
2016	3.9