Year	Cases per 100,000
1990	4.01
1991	3.69
1992	3.39
1993	3.13
1994	2.88
1995	2.66
1996	2.6
1997	2.55
1998	2.5
1999	2.45
2000	2.4
2001	2.41
2002	2.43
2003	2.44
2004	2.45
2005	2.47
2006	2.5
2007	2.53
2008	2.56
2009	2.59
2010	2.63
2011	2.65
2012	2.67
2013	2.69
2014	2.71
2015	2.74
2016	2.76