Year	Cases per 100,000
1990	8.01
1991	7.76
1992	7.61
1993	7.48
1994	7.38
1995	7.26
1996	7.09
1997	6.87
1998	6.66
1999	6.5
2000	6.43
2001	6.38
2002	6.38
2003	6.34
2004	6.34
2005	6.36
2006	6.36
2007	6.44
2008	6.47
2009	6.55
2010	6.61
2011	6.6
2012	6.61
2013	6.61
2014	6.6
2015	6.59
2016	6.59