Year	% of children ages 12-23 months
1980	6.250635948257536
1981	12.063138580574128
1982	13.93491744603501
1983	20.852669036086574
1984	25.874895409895927
1985	32.56085771251169
1986	39.43813789605805
1987	43.79954250203286
1988	48.567430993009786
1989	55.13353984002081
1990	56.682066498951585
1991	53.40629828142182
1992	50.24870988769978
1993	51.07339823014497
1994	54.424671115741994
1995	54.035392325744674
1996	53.70499073237936
1997	53.2918434862785
1998	51.578157201510976
1999	49.8168177943297
2000	52.28558859053139
2001	52.46530559016248
2002	53.666871855422606
2003	56.2004572848231
2004	58.26680156227372
2005	60.09880645930912
2006	62.749225562662026
2007	64.63616787068726
2008	67.13652158644672
2009	71.28865993049769
2010	71.49546881072663
2011	70.08002493534474
2012	70.13251155203201
2013	69.06452063633873
2014	68.96033616728997
2015	68.15895838897225
2016	68.33461810321627
2017	69.89858576326816
2018	70.14542057581218
2019	71.04529717780458
2020	69.98253592449292
2021	68.27777437646363
2022	68.64476685604485