Year	Cases per 100,000
1990	28.61
1991	28.66
1992	28.74
1993	28.54
1994	29.01
1995	28.67
1996	28.72
1997	28.77
1998	29
1999	29.48
2000	29.45
2001	29.58
2002	29.46
2003	29.33
2004	29.42
2005	29.46
2006	29.48
2007	29.5
2008	29.58
2009	29.61
2010	29.56
2011	29.5
2012	29.4
2013	29.27
2014	29.11
2015	28.96
2016	28.8