Year % of new cases 2000 78 2001 81 2002 80 2003 81 2004 82 2005 83 2006 85 2007 88 2008 88 2009 88 2010 89 2011 88 2012 90 2013 91 2014 90 2015 90 2016 90 2017 90 2018 92 2019 93 2020 96 2021 96