Year	Cases per 100,000
1990	4.19
1991	4.23
1992	4.28
1993	4.32
1994	4.37
1995	4.41
1996	4.44
1997	4.47
1998	4.49
1999	4.52
2000	4.55
2001	4.55
2002	4.54
2003	4.53
2004	4.53
2005	4.52
2006	4.5
2007	4.48
2008	4.45
2009	4.43
2010	4.41
2011	4.41
2012	4.41
2013	4.41
2014	4.42
2015	4.42
2016	4.42