Year	Cases per 100,000
1990	2.48
1991	2.28
1992	2.1
1993	1.94
1994	1.79
1995	1.65
1996	1.6
1997	1.56
1998	1.51
1999	1.47
2000	1.43
2001	1.43
2002	1.43
2003	1.42
2004	1.42
2005	1.42
2006	1.43
2007	1.44
2008	1.46
2009	1.47
2010	1.48
2011	1.49
2012	1.5
2013	1.51
2014	1.52
2015	1.53
2016	1.54