Year	Cases per 100,000
1990	40.67
1991	38.72
1992	35.51
1993	32.12
1994	32.6
1995	31.39
1996	30.4
1997	29.79
1998	29.37
1999	29.65
2000	29.87
2001	30.07
2002	29.9
2003	29.57
2004	29
2005	28.44
2006	26.85
2007	25.51
2008	24.68
2009	24.34
2010	24.88
2011	25.8
2012	23.61
2013	21.73
2014	20.93
2015	20.43
2016	20.02