Year % of people at risk 2003 50.2 2004 41 2005 41.2 2006 33.4 2007 51.7 2008 56.9 2011 47.6 2012 50.5 2013 28.6 2014 32.5 2015 28.8 2017 26.7 2019 25.5 2020 14 2021 15.1 2022 10.6