Year % of people at risk 2003 99.3 2004 98.3 2005 96.3 2006 97.3 2007 98.4 2008 98.7 2009 98.5 2010 98.3 2011 99.3 2012 98.3 2013 98.1 2014 98.7 2015 98.4 2016 98 2017 96.7 2018 96