Year % of new cases 2000 73 2001 77 2002 76 2003 79 2004 82 2005 67 2006 68 2007 67 2008 61 2009 65 2010 61 2011 61 2012 64 2013 56 2014 62 2015 72 2016 75 2017 90 2018 90 2019 90 2020 90 2021 90