Year	Cases per 100,000
1990	3.38
1991	3.36
1992	3.33
1993	3.31
1994	3.29
1995	3.27
1996	3.34
1997	3.42
1998	3.51
1999	3.59
2000	3.68
2001	3.7
2002	3.72
2003	3.73
2004	3.75
2005	3.77
2006	3.82
2007	3.87
2008	3.92
2009	3.97
2010	4.02
2011	4.07
2012	4.12
2013	4.17
2014	4.22
2015	4.28
2016	4.34