Year % of children ages 12-23 months 1980 32 1981 40 1982 2 1983 25 1984 22 1985 57 1986 61 1987 64 1988 69 1989 65 1990 84 1991 93 1992 91 1993 96 1994 96 1995 94 1996 94 1997 75 1998 77 1999 79 2000 81 2001 83 2002 85 2003 86 2004 88 2005 90 2006 92 2007 94 2008 95 2009 95 2010 96 2011 96 2012 98 2013 94 2014 99 2015 97 2016 97 2017 99 2018 95 2019 96 2020 96 2021 99 2022 99