Every two years modeled estimate, % of children under 5 2000 4.8 2001 5.4 2002 5.9 2003 6 2004 5.7 2005 5.1 2006 4.4 2007 3.8 2008 3.3 2009 3 2010 2.9 2011 2.8 2012 2.8 2013 2.8 2014 2.9 2015 2.9 2016 2.9 2017 3 2018 3 2019 3 2020 3.1 2021 3.2 2022 3.3