Year % of people at risk 2003 35.2 2004 24.4 2005 22.9 2006 7.5 2007 6.3 2008 1.9 2009 1.5 2010 1.9 2011 1 2012 1.2 2013 0.5 2014 0.4 2015 0.9 2016 1.5 2017 1.3 2018 1.2 2019 1.1 2020 0.6 2021 0.4 2022 0.4