Year	Cases per 100,000
1990	16.24
1991	16.12
1992	16.01
1993	15.9
1994	15.8
1995	15.71
1996	15.31
1997	14.94
1998	14.59
1999	14.25
2000	13.93
2001	13.97
2002	14.01
2003	14.06
2004	14.11
2005	14.17
2006	14.18
2007	14.18
2008	14.18
2009	14.19
2010	14.21
2011	14.24
2012	14.27
2013	14.31
2014	14.34
2015	14.38
2016	14.43