Year	Cases per 100,000
1990	1.32
1991	1.31
1992	1.31
1993	1.3
1994	1.3
1995	1.3
1996	1.33
1997	1.37
1998	1.41
1999	1.45
2000	1.49
2001	1.54
2002	1.58
2003	1.63
2004	1.68
2005	1.73
2006	1.8
2007	1.86
2008	1.93
2009	2.01
2010	2.09
2011	2.06
2012	2.03
2013	2
2014	1.98
2015	1.95
2016	1.93