Year	Cases per 100,000
1990	1.33
1991	1.31
1992	1.3
1993	1.29
1994	1.28
1995	1.26
1996	1.26
1997	1.26
1998	1.27
1999	1.27
2000	1.27
2001	1.27
2002	1.28
2003	1.28
2004	1.29
2005	1.29
2006	1.3
2007	1.31
2008	1.33
2009	1.34
2010	1.35
2011	1.36
2012	1.38
2013	1.4
2014	1.41
2015	1.43
2016	1.45