Year % of children ages 12-23 months 1980 68.84780720831353 1981 69.40325251876409 1982 69.03330547727042 1983 69.88202678882014 1984 71.17180453272839 1985 95.22114161967316 1986 94.17983046469806 1987 95.48355052818395 1988 96.6038837294262 1989 96.61881580644949 1990 96.61844569973026 1991 96.71622375209805 1992 93.2600766193998 1993 88.44792059336028 1994 95.79268034847705 1995 96.28967014932144 1996 96.72298765211055 1997 96.82312379151958 1998 97.03562589703743 1999 97.16851542573635 2000 97.46668761115919 2001 97.64797176734099 2002 97.79911710084629 2003 97.67923089671812 2004 97.78273310855762 2005 97.79667791686163 2006 97.78917564113897 2007 97.68176217308178 2008 97.72695348426714 2009 97.52309638362703 2010 97.25184123956674 2011 96.24082911954916 2012 96.63388385376646 2013 96.67969033999755 2014 95.97538234049081 2015 95.15064010090744 2016 95.12415387123222 2017 92.95083005511258 2018 93.41751414204755 2019 94.05879391892688 2020 91.88582784826227 2021 90.87538840109053 2022 90.79190417344704