Year	Cases per 100,000
1990	26.3
1991	26.77
1992	27.26
1993	27.76
1994	28.28
1995	28.81
1996	29.19
1997	29.59
1998	30
1999	30.42
2000	30.85
2001	31
2002	31.16
2003	31.32
2004	31.48
2005	31.65
2006	31.44
2007	31.23
2008	31.02
2009	30.82
2010	30.63
2011	30.41
2012	30.2
2013	30
2014	29.79
2015	29.59
2016	29.4