Year	Cases per 100,000
1990	18.01
1991	19.54
1992	21.2
1993	23.02
1994	24.99
1995	27.15
1996	28.43
1997	29.78
1998	31.21
1999	32.7
2000	34.27
2001	34.54
2002	34.81
2003	35.09
2004	35.38
2005	35.67
2006	36.01
2007	36.34
2008	36.68
2009	37.03
2010	37.4
2011	38.03
2012	38.68
2013	39.35
2014	40.02
2015	40.71
2016	41.42