Year	% of children ages 12-23 months
1980	55.257287868482074
1981	69.63547445800603
1982	72.30876987459479
1983	74.20179066033297
1984	79.90292198683986
1985	78.17440339168309
1986	81.47637931431683
1987	82.16424428004007
1988	82.8092423899138
1989	85.18823059961532
1990	87.67354372051494
1991	88.1860768106894
1992	87.35728338463872
1993	87.98625383334505
1994	91.0701763341636
1995	91.36944482849026
1996	93.87279120651822
1997	90.62112025537253
1998	90.94584152333914
1999	93.04343970729535
2000	92.69896621133695
2001	94.39585232617574
2002	94.52975257400455
2003	95.11455227517583
2004	95.43094766652813
2005	95.59086444540536
2006	96.09148555687791
2007	95.82115854075428
2008	95.59064271837435
2009	94.27718126983038
2010	93.57763202946921
2011	94.03575186442671
2012	94.68240800261565
2013	94.35204703365993
2014	92.23138390764952
2015	92.10288386891975
2016	92.10435419389609
2017	93.04705056216781
2018	93.705341123714
2019	94.07543359527826
2020	93.4706904357453
2021	93.87435638702092
2022	93.70506796856301