Year % of children ages 12-23 months 1980 34 1981 36 1982 43 1983 42 1984 45 1985 45 1986 44 1987 44 1988 43 1989 65 1990 65 1991 67 1992 68 1993 70 1994 71 1995 73 1996 74 1997 76 1998 84 1999 86 2000 86 2001 84 2002 83 2003 86 2004 89 2005 90 2006 91 2007 92 2008 93 2009 94 2010 94 2011 95 2012 95 2013 96 2014 96 2015 95 2016 95 2017 95 2018 94 2019 94 2020 94 2021 94 2022 93