Year	Cases per 100,000
1990	7.58
1991	7.55
1992	7.54
1993	7.57
1994	7.66
1995	7.85
1996	7.92
1997	7.97
1998	7.9
1999	7.78
2000	7.66
2001	7.61
2002	7.57
2003	7.53
2004	7.49
2005	7.45
2006	7.46
2007	7.47
2008	7.47
2009	7.47
2010	7.47
2011	7.6
2012	7.89
2013	8.05
2014	8.23
2015	8.42
2016	8.6