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