Year	Cases per 100,000
1990	16.41
1991	16.71
1992	17.02
1993	17.34
1994	17.66
1995	18
1996	17.85
1997	17.7
1998	17.56
1999	17.42
2000	17.29
2001	17.5
2002	17.71
2003	17.94
2004	18.17
2005	18.41
2006	18.37
2007	18.35
2008	18.34
2009	18.34
2010	18.36
2011	17.98
2012	17.61
2013	17.25
2014	16.9
2015	16.56
2016	16.23