Year % of children ages 12-23 months 1980 38.582303618711386 1981 46.86888019024426 1982 62.11079589457638 1983 69.61199970576938 1984 74.30838610316947 1985 78.78400926237653 1986 77.7577282707917 1987 77.13433893250513 1988 71.08976182600067 1989 80.76558677932653 1990 86.34090383726306 1991 84.03511727674682 1992 83.20491976694984 1993 88.98966389591615 1994 88.05161705551086 1995 88.15700258144626 1996 85.75373208434014 1997 88.52817330738844 1998 90.7827485453979 1999 85.91109740331072 2000 86.8471523539576 2001 86.90588215018182 2002 87.3773591509244 2003 89.04134844232887 2004 91.33543335433355 2005 92.12433261903897 2006 91.50629877318012 2007 92.95457269014851 2008 91.79281821630474 2009 95.0107192030827 2010 95.25489159665425 2011 91.78266924860013 2012 92.19567302985806 2013 92.29490311503557 2014 91.35639448191415 2015 90.58737408187274 2016 92.02360056341912 2017 87.66168631724958 2018 91.76165401581687 2019 91.98496674189924 2020 81.44757875410359 2021 86.046325525284 2022 87.78398068062404