Year	Cases per 100,000
1990	5.43
1991	5.38
1992	5.26
1993	5.19
1994	5.11
1995	5.03
1996	4.95
1997	4.89
1998	4.87
1999	4.9
2000	4.82
2001	4.79
2002	4.76
2003	4.77
2004	4.83
2005	4.76
2006	4.84
2007	4.88
2008	4.87
2009	4.87
2010	4.89
2011	4.95
2012	5.09
2013	5.15
2014	5.17
2015	5.19
2016	5.25