Year	Cases per 100,000
1990	5.61
1991	5.68
1992	5.76
1993	5.84
1994	5.9
1995	5.98
1996	5.95
1997	5.92
1998	5.9
1999	5.92
2000	5.94
2001	6.02
2002	6.1
2003	6.19
2004	6.28
2005	6.37
2006	6.38
2007	6.39
2008	6.4
2009	6.41
2010	6.41
2011	6.38
2012	6.36
2013	6.33
2014	6.31
2015	6.29
2016	6.27