Year	% of children ages 12-23 months
1980	6.181577696757283
1981	10.789379874818085
1982	11.40699483587965
1983	13.140378386906528
1984	22.63283856638868
1985	28.894978135279928
1986	33.69380153024931
1987	40.36477874926261
1988	44.9122477492914
1989	50.273090622662615
1990	54.25865475553772
1991	47.8452766008824
1992	49.45953732596601
1993	47.07036256194812
1994	49.727659337386186
1995	48.28815131353046
1996	46.20174512198426
1997	44.686770318875865
1998	46.9734378241266
1999	48.062081629174074
2000	50.60296492140524
2001	51.48512988431129
2002	52.83462385635727
2003	55.9944975802117
2004	59.60847883627674
2005	62.204621867246736
2006	63.83852810147536
2007	65.2953820975272
2008	68.99707252272538
2009	72.52907476616011
2010	70.37673551112229
2011	70.4356588911506
2012	69.45135186257873
2013	68.79981362501442
2014	69.69331266509764
2015	69.25038921841296
2016	72.12661249877486
2017	72.76814796515525
2018	75.04765849136791
2019	76.08758882693738
2020	72.78545851804112
2021	71.17442744702154
2022	71.8867350199622