Year	Cases per 100,000
1990	19.63
1991	19.37
1992	19.79
1993	19.81
1994	19.85
1995	19.95
1996	19.86
1997	20.25
1998	20.46
1999	20.59
2000	20.71
2001	21.17
2002	21.18
2003	21.58
2004	21.69
2005	22.22
2006	22.38
2007	21.87
2008	21.74
2009	21.64
2010	21.27
2011	21.1
2012	21.08
2013	21.24
2014	21.79
2015	21.81
2016	21.77