Year	% of children ages 12-23 months
1980	0.2995197480169954
1981	0.2588176990049641
1982	0.5817671539350531
1983	2.49295487208837
1984	4.450597056582902
1985	6.204582908326196
1986	13.79309068622664
1987	25.10286138598543
1988	32.6638400041465
1989	44.23754265996397
1990	55.959654672813514
1991	46.82561410609573
1992	52.89986886922381
1993	59.17598430201244
1994	65.67861784416304
1995	68.58672740180872
1996	63.88745875184438
1997	56.54319200026681
1998	54.9805784546268
1999	57.68931531546955
2000	57.85224662036313
2001	59.36650306001226
2002	58.52644157505324
2003	61.90395885254699
2004	65.52375502875314
2005	68.8373892723774
2006	69.0369445123457
2007	69.93573006188333
2008	71.47295592643248
2009	75.8921683232144
2010	78.33624444111098
2011	80.45785467856577
2012	79.68931500110416
2013	80.64265889203195
2014	82.80985521269021
2015	85.07432308593965
2016	85.75909125773364
2017	87.51326288306656
2018	90.19740710930145
2019	91.61450721563081
2020	87.80939592548157
2021	87.36341813284326
2022	91.72149195148185