Year	Cases per 100,000
1990	8.48
1991	8.33
1992	8
1993	7.72
1994	7.6
1995	7.39
1996	7.2
1997	7.02
1998	6.87
1999	6.65
2000	6.47
2001	6.31
2002	6.17
2003	6.05
2004	5.96
2005	5.88
2006	5.82
2007	5.76
2008	5.74
2009	5.7
2010	5.66
2011	5.6
2012	5.53
2013	5.46
2014	5.38
2015	5.3
2016	5.2