Year	Cases per 100,000
1990	35.3
1991	35.95
1992	35.74
1993	35.02
1994	33.85
1995	32.7
1996	32.35
1997	31.24
1998	30.39
1999	30.45
2000	30.22
2001	29.61
2002	29.38
2003	27.89
2004	27.7
2005	26.87
2006	27.03
2007	25.97
2008	25.68
2009	25.49
2010	24.72
2011	23.91
2012	23.85
2013	23.76
2014	23.75
2015	23.88
2016	24