Year	Cases per 100,000
1990	17.77
1991	17.76
1992	17.93
1993	18
1994	17.91
1995	17.76
1996	17.97
1997	18.29
1998	18.63
1999	19.52
2000	20.41
2001	20.8
2002	21.07
2003	21.13
2004	21.14
2005	21.27
2006	21.39
2007	21.44
2008	21.4
2009	21.45
2010	21.38
2011	21.53
2012	21.74
2013	21.98
2014	22.12
2015	22.02
2016	21.96