Year % of children ages 12-23 months 1980 63 1981 76 1982 80 1983 62 1984 70 1985 78 1986 73 1987 85 1988 82 1989 87 1990 92 1991 85 1992 85 1993 90 1994 93 1995 96 1996 96 1997 96 1998 85 1999 74 2000 80 2001 87 2002 87 2003 87 2004 87 2005 95 2006 95 2007 95 2008 96 2009 98 2010 97 2011 96 2012 98 2013 97 2014 96 2015 97 2016 95 2017 92 2018 93 2019 88 2020 85 2021 82 2022 79