Year	Cases per 100,000
1990	6.79
1991	6.75
1992	6.83
1993	6.91
1994	6.99
1995	7.14
1996	7.04
1997	6.85
1998	6.83
1999	6.79
2000	6.81
2001	6.78
2002	6.71
2003	6.67
2004	6.72
2005	6.62
2006	6.59
2007	6.48
2008	6.46
2009	6.42
2010	6.41
2011	6.39
2012	6.35
2013	6.27
2014	6.17
2015	6.07
2016	5.98