Year % of children ages 12-23 months 1981 30 1982 39 1983 43 1984 50 1985 61 1986 74 1987 86 1988 89 1989 89 1990 89 1991 79 1992 93 1993 89 1994 96 1995 82 1996 82 1997 82 1998 83 1999 83 2000 84 2001 84 2002 85 2003 85 2004 86 2005 86 2006 87 2007 87 2008 88 2009 88 2010 89 2011 91 2012 95 2013 98 2014 98 2015 90 2016 90 2017 90 2018 90 2019 90 2020 83 2021 77 2022 97