Year	% of children ages 12-23 months
1980	16.59871516704114
1981	19.901383366642992
1982	22.16642903617017
1983	35.87560936114839
1984	42.29138520513289
1985	46.76560447087506
1986	49.99151972626761
1987	54.35363916201749
1988	63.36467942359921
1989	68.4433377800036
1990	76.06576869020121
1991	72.00356182506924
1992	70.59092401778409
1993	70.50354331120826
1994	72.90027937780795
1995	73.3080750665664
1996	72.49640480632328
1997	71.61838031132818
1998	71.90262217130537
1999	71.93419276874185
2000	72.59518550139602
2001	73.19761221238934
2002	72.87204785603923
2003	74.51777620098785
2004	76.51497138289606
2005	77.34917247522775
2006	78.54941172077423
2007	78.58237278703139
2008	81.19406780091673
2009	83.21286345962041
2010	83.67395940014764
2011	84.70491179505989
2012	84.4499392598165
2013	84.08067813636856
2014	84.81806762098891
2015	84.99757181826621
2016	86.07369799003716
2017	86.02706704879807
2018	86.66517388743267
2019	86.7521639543231
2020	83.62434849409755
2021	81.77987659161316
2022	84.58050208749384