Year	Cases per 100,000
1990	5.3
1991	5.35
1992	5.41
1993	5.48
1994	5.54
1995	5.61
1996	5.52
1997	5.43
1998	5.34
1999	5.25
2000	5.17
2001	5.26
2002	5.34
2003	5.43
2004	5.52
2005	5.61
2006	5.59
2007	5.56
2008	5.54
2009	5.52
2010	5.5
2011	5.45
2012	5.4
2013	5.36
2014	5.31
2015	5.26
2016	5.22