Year % of children ages 12-23 months 1980 46 1981 35 1982 23 1983 27 1984 45 1985 38 1986 42 1987 66 1988 69 1989 67 1990 77 1991 76 1992 71 1993 65 1994 68 1995 69 1996 72 1997 72 1998 70 1999 88 2000 86 2001 84 2002 78 2003 84 2004 90 2005 89 2006 99 2007 88 2008 85 2009 86 2010 83 2011 91 2012 92 2013 83 2014 77 2015 87 2016 94 2017 83 2018 85 2019 94 2020 94 2021 87 2022 89