Year	Cases per 100,000
1990	7.26
1991	7.01
1992	7.12
1993	7.17
1994	7.01
1995	6.67
1996	6.42
1997	6.3
1998	6.3
1999	6.41
2000	6.48
2001	6.49
2002	6.51
2003	6.36
2004	6.16
2005	5.88
2006	5.71
2007	5.5
2008	5.29
2009	5.12
2010	5.02
2011	4.91
2012	4.87
2013	4.86
2014	4.9
2015	4.89
2016	4.86