Year	Cases per 100,000
1990	31.72
1991	31.79
1992	31.58
1993	30.98
1994	30.22
1995	29.36
1996	28.51
1997	26.59
1998	24.87
1999	24.76
2000	24.44
2001	23.82
2002	23.45
2003	23.3
2004	23.82
2005	23.92
2006	24.33
2007	24.43
2008	24.24
2009	23.98
2010	23.48
2011	23.16
2012	23.2
2013	23.18
2014	22.72
2015	22.43
2016	22.2