Year	Cases per 100,000
1990	23.75
1991	23.66
1992	23.73
1993	23.8
1994	23.74
1995	23.5
1996	22.62
1997	21.34
1998	20.91
1999	20.1
2000	19.09
2001	18.88
2002	18.69
2003	18.59
2004	18.13
2005	17.87
2006	17.58
2007	17.41
2008	17.3
2009	16.7
2010	16.25
2011	16.17
2012	15.96
2013	15.65
2014	15.61
2015	15.6
2016	15.56