Year Cases per 100,000 2000 67 2001 76 2002 84 2003 163 2005 84 2006 89 2007 81 2008 82 2009 78 2010 74 2011 75 2012 90 2013 81 2014 70 2015 67 2016 65 2017 61 2018 60 2019 58 2020 40