Year % of new cases 2001 91 2002 84 2003 88 2004 75 2005 81 2006 87 2007 87 2008 88 2009 86 2010 89 2011 92 2012 92 2013 88 2014 88 2015 87 2016 87 2017 87 2018 89 2019 88 2020 89 2021 90