Year	% of children ages 12-23 months
1980	4.017409961392955
1981	3.8083917454230547
1982	3.957889212047641
1983	54.66034936914426
1984	60.992667229196044
1985	66.81981549011586
1986	56.806689212536405
1987	67.67908577869159
1988	82.1113526914688
1989	85.16234613244943
1990	88.98406225819402
1991	85.61315330838967
1992	82.33653100311852
1993	78.7232401310655
1994	75.99697741142438
1995	78.9293850883302
1996	83.38308210764043
1997	82.50520972857834
1998	82.95639432979111
1999	83.77443982084299
2000	83.6779642736933
2001	84.34686135477375
2002	83.91133328784731
2003	84.55198962986566
2004	86.34851300262423
2005	86.39556180853474
2006	90.1774404425261
2007	89.67263992424162
2008	91.77078457118921
2009	92.95705521403379
2010	93.65249370079808
2011	93.83534049766895
2012	93.92309719330018
2013	94.81956304022766
2014	94.63786895290289
2015	94.47082714931271
2016	94.81392586230467
2017	94.63415485629193
2018	94.73056963605848
2019	93.79828904928983
2020	91.63124256210938
2021	86.14837981271772
2022	89.22602306718423