Every two years modeled estimate, % of children under 5 2000 4.7 2001 4.5 2002 4.3 2003 4.1 2004 3.8 2005 3.5 2006 3.3 2007 3 2008 2.7 2009 2.5 2010 2.2 2011 2 2012 1.8 2013 1.6 2014 1.5 2015 1.3 2016 1.2 2017 1.1 2018 1 2019 0.9 2020 0.9 2021 0.8 2022 0.8