Year % of new cases 2000 87 2001 87 2002 87 2003 87 2004 91 2005 91 2006 91 2007 93 2008 92 2009 92 2010 91 2011 90 2012 88 2013 89 2014 86 2015 85 2016 90 2017 91 2018 91 2019 88 2020 90 2021 90