Year	Cases per 100,000
1990	20.32
1991	20.38
1992	20.45
1993	20.51
1994	20.58
1995	20.66
1996	21.22
1997	21.81
1998	22.43
1999	23.09
2000	23.78
2001	24.64
2002	25.56
2003	26.52
2004	27.53
2005	28.62
2006	29.17
2007	29.72
2008	30.31
2009	30.91
2010	31.55
2011	31.9
2012	32.28
2013	32.66
2014	33.06
2015	33.45
2016	33.87