Year	Cases per 100,000
1990	17.86
1991	18
1992	18.15
1993	18.3
1994	18.45
1995	18.61
1996	18.74
1997	18.88
1998	19.03
1999	19.17
2000	19.32
2001	19.43
2002	19.54
2003	19.65
2004	19.76
2005	19.88
2006	20.01
2007	20.13
2008	20.26
2009	20.39
2010	20.53
2011	20.68
2012	20.85
2013	21.01
2014	21.18
2015	21.35
2016	21.52