Year	Cases per 100,000
1990	15.05
1991	15.17
1992	15.3
1993	15.44
1994	15.57
1995	15.72
1996	16.11
1997	16.52
1998	16.94
1999	17.37
2000	17.82
2001	18.35
2002	18.9
2003	19.47
2004	20.05
2005	20.66
2006	21.05
2007	21.45
2008	21.86
2009	22.27
2010	22.7
2011	22.95
2012	23.21
2013	23.48
2014	23.74
2015	24.01
2016	24.29