Year	Cases per 100,000
1990	21.25
1991	21
1992	20.76
1993	20.52
1994	20.3
1995	20.09
1996	20.88
1997	21.74
1998	22.66
1999	23.65
2000	24.73
2001	25.82
2002	27
2003	28.26
2004	29.61
2005	31.06
2006	30.33
2007	29.61
2008	28.93
2009	28.28
2010	27.66
2011	27.63
2012	27.61
2013	27.6
2014	27.59
2015	27.59
2016	27.6