Year	Cases per 100,000
1990	28.66
1991	28.56
1992	28.57
1993	28.63
1994	28.93
1995	29.22
1996	29.32
1997	30.16
1998	30.85
1999	31.31
2000	32.01
2001	31.9
2002	31.94
2003	31.82
2004	31.83
2005	31.9
2006	31.44
2007	31.18
2008	30.74
2009	30.34
2010	30.22
2011	29.99
2012	29.78
2013	29.55
2014	29.24
2015	28.89
2016	28.51