Year % of new cases 2000 71 2001 55 2002 80 2003 77 2004 72 2005 72 2006 69 2007 72 2008 69 2009 70 2010 72 2011 73 2012 72 2013 72 2014 71 2015 71 2016 72 2017 71 2018 71 2019 69 2020 67 2021 65