Year	Cases per 100,000
1990	27.72
1991	28.48
1992	29.28
1993	30.11
1994	30.97
1995	31.86
1996	30.05
1997	28.35
1998	26.76
1999	25.26
2000	23.85
2001	24.7
2002	25.59
2003	26.51
2004	27.48
2005	28.48
2006	29.2
2007	29.93
2008	30.68
2009	31.46
2010	32.27
2011	32.29
2012	32.32
2013	32.35
2014	32.39
2015	32.42
2016	32.46