Year	Cases per 100,000
1990	30.7
1991	30.47
1992	30.25
1993	30.05
1994	29.84
1995	29.66
1996	30.25
1997	30.87
1998	31.5
1999	32.16
2000	32.84
2001	32.57
2002	32.3
2003	32.04
2004	31.79
2005	31.55
2006	31.22
2007	30.9
2008	30.6
2009	30.32
2010	30.06
2011	29.87
2012	29.69
2013	29.51
2014	29.33
2015	29.16
2016	29