Year	% of children ages 12-23 months
1980	4.732628271609122
1981	8.471963316552104
1982	10.407466285966942
1983	13.82512513404697
1984	19.850588627459274
1985	25.434055862762932
1986	32.33118826215185
1987	35.786753133770475
1988	42.506250852855885
1989	52.407241730507764
1990	56.618442038305616
1991	54.27470081160013
1992	53.42093389340436
1993	54.48132531800693
1994	57.51643763896545
1995	57.301171987916376
1996	56.67902939299617
1997	56.590951531734945
1998	56.44332383182726
1999	56.39818221236142
2000	58.131411994398796
2001	58.272561454608926
2002	58.93246091220844
2003	61.553698243382726
2004	63.911776444996875
2005	65.89766951943469
2006	66.78891170158604
2007	67.63875098725644
2008	69.6138417651205
2009	72.70331306802314
2010	72.5036373582938
2011	72.03012261044796
2012	71.40275521805711
2013	71.65369095953766
2014	72.12976715547507
2015	72.20296902215567
2016	72.7509562502786
2017	74.05646868585232
2018	74.54610673638715
2019	75.06238248719289
2020	74.67207045787484
2021	72.31456454832285
2022	73.3251282012221