Year	% of children ages 12-23 months
1980	12.65351150176554
1981	15.210634918114524
1982	16.25887216585549
1983	34.476925608317444
1984	38.542414264721955
1985	44.06394602854388
1986	44.662838314184576
1987	52.04711208142845
1988	61.64844892392268
1989	67.1940094671957
1990	72.80234522602238
1991	68.9748587170104
1992	69.53111179417336
1993	70.08003259893653
1994	71.68504955602128
1995	73.53644427420176
1996	73.38511268947207
1997	71.29732061680724
1998	70.91411447208003
1999	71.60741223746989
2000	72.12334207349309
2001	72.78019354998172
2002	72.28141749209341
2003	73.81921511868913
2004	75.66896502589883
2005	77.05191264418782
2006	78.76237735913142
2007	79.3406272840647
2008	80.89864069547639
2009	83.28802361600249
2010	84.11150667184113
2011	84.4892252098494
2012	84.12081365659219
2013	84.21591035883299
2014	84.5425966013015
2015	84.86217592427846
2016	85.16173841603249
2017	85.4458280485184
2018	86.4700650970285
2019	86.25732457969791
2020	83.83568428017695
2021	81.9074841654772
2022	83.5442409987272