Year % of new cases 2000 69 2001 66 2002 71 2003 69 2004 63 2005 28 2006 53 2008 76 2009 78 2010 77 2011 71 2012 70 2014 69 2015 71 2016 77 2017 66 2018 62 2019 72 2020 75 2021 78