Year % of children ages 12-23 months 1980 30 1981 81 1982 75 1983 76 1984 81 1985 85 1986 88 1987 90 1988 93 1989 94 1990 92 1991 92 1992 92 1993 91 1994 94 1995 95 1996 96 1997 99 1998 99 1999 85 2000 91 2001 99 2002 95 2003 97 2004 95 2005 95 2006 98 2007 98 2008 97 2009 98 2010 98 2011 98 2012 98 2013 98 2014 98 2015 99 2016 98 2017 99 2018 96 2019 89 2020 77 2021 77 2022 77