Year	Cases per 100,000
1990	16.45
1991	16.12
1992	15.9
1993	15.6
1994	15.33
1995	15.18
1996	14.64
1997	14.34
1998	14
1999	13.66
2000	13.26
2001	13.32
2002	13.44
2003	13.5
2004	13.58
2005	13.7
2006	13.54
2007	13.4
2008	13.31
2009	13.19
2010	13.14
2011	13.18
2012	13.23
2013	13.28
2014	13.32
2015	13.37
2016	13.44