Year	Cases per 100,000
1990	28.18
1991	23.63
1992	24.5
1993	26.06
1994	25.52
1995	20.59
1996	22.9
1997	24.17
1998	21.75
1999	19.88
2000	18.73
2001	17.47
2002	14.38
2003	12.93
2004	12.62
2005	11.14
2006	9.85
2007	11.42
2008	10.68
2009	10.82
2010	11.54
2011	11.43
2012	11.28
2013	11.94
2014	11.5
2015	11.83
2016	11.12