Year	Cases per 100,000
1990	25.82
1991	25.55
1992	25.91
1993	26.21
1994	26.45
1995	26.71
1996	26.83
1997	26.78
1998	26.56
1999	26.38
2000	26.44
2001	26.45
2002	26.31
2003	25.82
2004	25.37
2005	24.77
2006	24.14
2007	23.59
2008	23.13
2009	22.58
2010	22.15
2011	21.73
2012	21.35
2013	21.09
2014	20.7
2015	20.54
2016	20.55