Year	Cases per 100,000
1990	25.66
1991	25.78
1992	26.04
1993	26.26
1994	25.61
1995	24.3
1996	22.74
1997	21.65
1998	21.98
1999	21.45
2000	21.54
2001	21.05
2002	20.47
2003	20.47
2004	19.37
2005	18.98
2006	19.69
2007	20.25
2008	20.31
2009	20.25
2010	19.37
2011	19.53
2012	20.15
2013	20.21
2014	21.06
2015	21.71
2016	22.19