Year % of new cases 2000 76 2001 69 2002 81 2003 80 2004 75 2005 74 2006 72 2007 77 2008 72 2009 74 2010 74 2011 75 2012 74 2013 75 2014 75 2015 75 2016 75 2017 76 2018 75 2019 74 2020 72 2021 71