Year	Cases per 100,000
1990	24.42
1991	24.75
1992	24.5
1993	23.34
1994	23.43
1995	22.15
1996	21.15
1997	19.98
1998	19.57
1999	18.72
2000	17.87
2001	16.96
2002	16.87
2003	16.33
2004	15.57
2005	14.66
2006	14.39
2007	13.48
2008	13.46
2009	13.41
2010	13.34
2011	13.43
2012	13.53
2013	13.8
2014	14.01
2015	13.9
2016	13.74