Year % of children ages 12-23 months 1980 22.528157781665158 1981 25.373197004726556 1982 31.11612840046329 1983 29.20282444171025 1984 33.54268210237057 1985 58.89080717442434 1986 62.1846524535677 1987 64.69009329242392 1988 77.29075898003174 1989 79.56283597550882 1990 82.45538575701389 1991 81.24114475999326 1992 83.43410150758613 1993 83.831166266678 1994 83.37404758319998 1995 84.01337979370794 1996 86.6858115042614 1997 86.04075499831843 1998 90.20857825859952 1999 90.03194283855697 2000 89.97420097938816 2001 89.1940047247724 2002 87.74943508408533 2003 87.5508772838725 2004 87.63536853809019 2005 87.73899906842978 2006 87.61225529515369 2007 88.09255729892647 2008 87.77270991320226 2009 89.73946305248367 2010 89.97841773537301 2011 90.35542202818199 2012 86.96950797734513 2013 88.24481257285363 2014 87.00555639289827 2015 87.1404236502887 2016 89.89494322038028 2017 88.92733626300327 2018 87.8902767601156 2019 87.98375009336596 2020 86.08315151108181 2021 86.23464189325617 2022 87.13895865444968