Year	Cases per 100,000
1990	6.34
1991	6.37
1992	6.4
1993	6.43
1994	6.47
1995	6.51
1996	6.47
1997	6.44
1998	6.42
1999	6.39
2000	6.38
2001	6.29
2002	6.21
2003	6.14
2004	6.06
2005	5.99
2006	5.98
2007	5.96
2008	5.95
2009	5.94
2010	5.93
2011	5.93
2012	5.94
2013	5.95
2014	5.96
2015	5.98
2016	6