Year	% of children ages 12-23 months
1981	18
1982	20
1983	20
1984	21
1985	27
1986	32
1987	30
1988	28
1989	28
1990	33
1991	29
1992	39
1993	44
1994	50
1995	55
1996	50
1997	28
1998	16
1999	53
2000	51
2001	75
2002	89
2003	76
2004	70
2005	71
2006	68
2007	75
2008	74
2009	64
2010	64
2011	75
2012	80
2013	80
2014	81
2015	73
2016	74
2017	76
2018	77
2019	80
2020	72
2021	68
2022	76