Every two years modeled estimate, % of children under 5 2000 33 2001 33.5 2002 34 2003 34.6 2004 35.1 2005 35.5 2006 35.9 2007 36 2008 35.9 2009 35.6 2010 35 2011 34.4 2012 33.7 2013 33.2 2014 32.7 2015 32.2 2016 31.7 2017 31.1 2018 30.5 2019 29.8 2020 29.1 2021 28.5 2022 27.9