Year	% of children ages 12-23 months
1980	9.527634971514129
1981	15.741594952954351
1982	19.043226728910614
1983	21.433327195367976
1984	22.69117806610844
1985	28.629142592285604
1986	36.15409014297992
1987	38.84760542179443
1988	44.45220543584102
1989	48.44327767739681
1990	52.507268119210345
1991	46.257380343474075
1992	45.848211801111454
1993	47.81257290823235
1994	53.75015808883193
1995	52.46520817214509
1996	53.3639027923335
1997	51.75170256386211
1998	49.874450005362355
1999	50.33885124149978
2000	54.478439308290106
2001	55.0066572259354
2002	57.27167037523457
2003	60.93360385917823
2004	63.20579430759651
2005	65.89953428102787
2006	68.13615714682165
2007	69.93655119801598
2008	69.95945387713175
2009	72.7535595792214
2010	74.69617281722111
2011	74.77710818207163
2012	75.63881384855789
2013	74.12969628286491
2014	73.76128735364844
2015	73.55890965698964
2016	72.55103855335244
2017	73.80778215896639
2018	73.4474301776123
2019	73.5424676333595
2020	71.87147787994756
2021	69.4035296278792
2022	70.13324298659487