Year % of new cases 2000 77 2001 72 2002 79 2003 46 2004 67 2005 80 2006 66 2007 88 2008 88 2009 87 2010 86 2011 87 2012 83 2013 88 2014 89 2015 89 2016 89 2017 91 2018 89 2019 91 2020 91 2021 92