Year	% of children ages 12-23 months
1980	8.027127010553407
1981	16.35356472715873
1982	16.86124864035801
1983	27.684395779341397
1984	34.328494168469376
1985	38.69089069257313
1986	41.54057816098324
1987	48.53809484263274
1988	50.7728703546955
1989	54.59433641328543
1990	59.32927814466441
1991	53.68533535743047
1992	52.83740415170255
1993	56.61936648761415
1994	59.39023476809752
1995	59.88905598144465
1996	58.74370943163174
1997	58.25637406964191
1998	55.71297157328587
1999	53.58945911128679
2000	56.981031368354444
2001	57.98317155648397
2002	59.60386437543123
2003	62.18498216549967
2004	65.35724569965201
2005	68.21050707207938
2006	69.29566313444775
2007	71.14768284218114
2008	72.70288164061732
2009	74.54686347837443
2010	74.52417005936196
2011	77.34918856116617
2012	76.75291291116929
2013	76.26935352376766
2014	78.34004386626997
2015	77.91913324861295
2016	78.57832686985851
2017	78.36692668831446
2018	79.26080949475617
2019	79.49258095015836
2020	77.39309400315418
2021	73.5774085919329
2022	73.4917735552517