Every two years modeled estimate, % of children under 5 2000 12.1 2001 12.5 2002 13.1 2003 13.7 2004 14.3 2005 14.8 2006 15.2 2007 15.5 2008 15.6 2009 15.7 2010 15.7 2011 15.7 2012 15.7 2013 15.8 2014 16 2015 16.2 2016 16.4 2017 16.6 2018 17 2019 17.3 2020 17.8 2021 18.2 2022 18.8