Year	Cases per 100,000
1990	14.3
1991	14.91
1992	15.6
1993	16.37
1994	17.22
1995	18.22
1996	18.16
1997	18.11
1998	18.06
1999	18.01
2000	17.97
2001	18.7
2002	19.49
2003	20.34
2004	21.26
2005	22.25
2006	22.93
2007	23.64
2008	24.39
2009	25.18
2010	26
2011	26.77
2012	27.57
2013	28.41
2014	29.28
2015	30.18
2016	31.13