Year	Cases per 100,000
1990	20.68
1991	20.95
1992	21.4
1993	21.85
1994	22.21
1995	22.34
1996	22.18
1997	21.73
1998	21.88
1999	20.69
2000	19.95
2001	19.12
2002	19.54
2003	19.54
2004	18.85
2005	19.14
2006	19.24
2007	19.42
2008	20.18
2009	20.22
2010	20.28
2011	20.89
2012	21.6
2013	22.47
2014	23.63
2015	24.62
2016	25.67