Year	Cases per 100,000
1990	4.56
1991	4.58
1992	4.6
1993	4.67
1994	4.76
1995	4.83
1996	4.9
1997	4.93
1998	4.94
1999	4.9
2000	4.79
2001	4.72
2002	4.65
2003	4.54
2004	4.51
2005	4.43
2006	4.34
2007	4.2
2008	4.09
2009	4.05
2010	4.06
2011	4.1
2012	4.13
2013	4.1
2014	4.04
2015	3.98
2016	3.93