Year	Cases per 100,000
1990	15.61
1991	15.77
1992	15.9
1993	16.01
1994	16.15
1995	16.26
1996	16.34
1997	16.48
1998	16.42
1999	16.58
2000	16.68
2001	16.74
2002	16.72
2003	16.53
2004	16.16
2005	16.11
2006	16.42
2007	18.1
2008	18.88
2009	20.45
2010	23.42
2011	22.23
2012	21
2013	20
2014	19.27
2015	18.68
2016	18.11