Year	Cases per 100,000
1990	7.75
1991	7.7
1992	7.66
1993	7.51
1994	7.45
1995	7.38
1996	7.36
1997	7.5
1998	7.47
1999	7.53
2000	7.56
2001	7.59
2002	7.62
2003	7.63
2004	7.62
2005	7.61
2006	7.6
2007	7.58
2008	7.59
2009	7.6
2010	7.61
2011	7.62
2012	7.62
2013	7.63
2014	7.6
2015	7.57
2016	7.54