Year	Cases per 100,000
1990	4.78
1991	4.79
1992	4.79
1993	4.8
1994	4.8
1995	4.81
1996	4.81
1997	4.82
1998	4.83
1999	4.84
2000	4.85
2001	4.79
2002	4.73
2003	4.67
2004	4.62
2005	4.57
2006	4.52
2007	4.47
2008	4.42
2009	4.38
2010	4.33
2011	4.34
2012	4.35
2013	4.37
2014	4.38
2015	4.39
2016	4.4