Year	Cases per 100,000
1990	8.51
1991	8.33
1992	8.19
1993	7.93
1994	7.67
1995	7.38
1996	7.03
1997	6.7
1998	6.68
1999	6.75
2000	6.91
2001	6.91
2002	7
2003	6.87
2004	6.78
2005	6.8
2006	6.79
2007	6.73
2008	6.68
2009	6.64
2010	6.55
2011	6.52
2012	6.47
2013	6.39
2014	6.31
2015	6.24
2016	6.17