Year	Cases per 100,000
1990	5.6
1991	5.62
1992	5.66
1993	5.71
1994	5.75
1995	5.79
1996	5.88
1997	5.97
1998	6.1
1999	6.27
2000	6.44
2001	6.55
2002	6.66
2003	6.71
2004	6.79
2005	6.85
2006	6.93
2007	6.94
2008	7.44
2009	7.14
2010	7.21
2011	6.97
2012	6.84
2013	6.72
2014	6.6
2015	6.49
2016	6.39