Year	Cases per 100,000
1990	6.81
1991	6.71
1992	6.63
1993	6.55
1994	6.47
1995	6.39
1996	6.3
1997	6.22
1998	6.14
1999	6.06
2000	5.98
2001	5.94
2002	5.91
2003	5.88
2004	5.84
2005	5.81
2006	5.83
2007	5.84
2008	5.86
2009	5.87
2010	5.9
2011	5.9
2012	5.9
2013	5.91
2014	5.91
2015	5.92
2016	5.93