Year	Cases per 100,000
1990	7.05
1991	6.66
1992	6.29
1993	5.9
1994	5.51
1995	5.15
1996	5.06
1997	4.98
1998	4.93
1999	4.88
2000	4.84
2001	4.8
2002	4.76
2003	4.67
2004	4.57
2005	4.43
2006	4.3
2007	4.1
2008	3.93
2009	3.87
2010	3.85
2011	3.83
2012	3.83
2013	3.87
2014	3.9
2015	3.86
2016	3.82