Year % of new cases 2001 56 2002 56 2003 76 2004 73 2005 69 2007 67 2008 66 2009 66 2010 67 2011 69 2012 71 2013 77 2014 81 2015 79 2016 76 2017 64 2018 71 2019 73 2020 75 2021 75