Year % of new cases 2000 79 2001 79 2002 79 2003 78 2004 73 2005 75 2006 76 2007 82 2008 78 2009 84 2010 81 2011 85 2012 86 2013 86 2014 87 2015 84 2016 86 2017 86 2018 87 2019 88 2020 90 2021 91