Year	Cases per 100,000
1990	5.89
1991	5.68
1992	5.51
1993	5.35
1994	5.27
1995	5.32
1996	5.42
1997	5.61
1998	5.93
1999	6.16
2000	6.43
2001	6.52
2002	6.56
2003	6.45
2004	6.15
2005	5.67
2006	5.27
2007	4.97
2008	4.7
2009	4.38
2010	4.17
2011	4.02
2012	4.05
2013	3.95
2014	3.93
2015	3.93
2016	3.96