Year	Cases per 100,000
1990	7.94
1991	7.95
1992	8.11
1993	8.26
1994	8.38
1995	8.53
1996	8.4
1997	8.57
1998	8.66
1999	8.74
2000	8.85
2001	8.71
2002	8.6
2003	8.52
2004	8.33
2005	8.14
2006	7.93
2007	7.79
2008	7.65
2009	7.54
2010	7.41
2011	7.29
2012	7.18
2013	7.08
2014	6.98
2015	6.9
2016	6.82