Year	Cases per 100,000
1990	21.31
1991	21.33
1992	21.36
1993	21.36
1994	21.37
1995	21.4
1996	21.57
1997	21.81
1998	22.02
1999	22.38
2000	22.95
2001	23.11
2002	23.32
2003	23.58
2004	24.06
2005	24.55
2006	25.23
2007	26.08
2008	26.83
2009	27.43
2010	28.16
2011	28.69
2012	29.29
2013	29.75
2014	30.12
2015	30.79
2016	31.37