Year	Cases per 100,000
1990	1.99
1991	1.96
1992	1.93
1993	1.9
1994	1.87
1995	1.85
1996	1.87
1997	1.9
1998	1.93
1999	1.96
2000	1.99
2001	2
2002	2.01
2003	2.03
2004	2.04
2005	2.07
2006	2.08
2007	2.1
2008	2.12
2009	2.14
2010	2.16
2011	2.18
2012	2.21
2013	2.24
2014	2.27
2015	2.3
2016	2.33