Year	Cases per 100,000
1990	6.62
1991	6.61
1992	6.61
1993	6.6
1994	6.59
1995	6.59
1996	6.58
1997	6.57
1998	6.55
1999	6.49
2000	6.45
2001	6.4
2002	6.37
2003	6.34
2004	6.32
2005	6.29
2006	6.29
2007	6.29
2008	6.29
2009	6.3
2010	6.3
2011	6.32
2012	6.33
2013	6.34
2014	6.36
2015	6.38
2016	6.4