Year	Cases per 100,000
1990	24.73
1991	25.36
1992	25.62
1993	26.27
1994	27.61
1995	27.38
1996	26.59
1997	25.49
1998	25.08
1999	25.14
2000	24.32
2001	23.8
2002	22.92
2003	22.05
2004	21.58
2005	19.66
2006	19.98
2007	19.77
2008	19.63
2009	19.13
2010	18.82
2011	18.83
2012	18.83
2013	18.98
2014	19.42
2015	18.98
2016	18.44