Year	Cases per 100,000
1990	32.05
1991	31.97
1992	31.52
1993	31.3
1994	31.04
1995	30.78
1996	30.71
1997	29.67
1998	29.23
1999	28.26
2000	28.18
2001	28.15
2002	27.86
2003	27.41
2004	26.9
2005	26.22
2006	25.85
2007	25.64
2008	25.37
2009	25.17
2010	24.96
2011	24.86
2012	24.84
2013	24.79
2014	24.46
2015	23.94
2016	24.14