Year	% of children ages 12-23 months
1981	45
1982	44
1983	43
1984	42
1985	41
1986	40
1987	27
1988	45
1989	42
1990	38
1991	32
1992	43
1993	49
1994	53
1995	67
1996	66
1997	64
1998	62
1999	62
2000	46
2001	58
2002	87
2003	84
2004	73
2005	65
2006	62
2007	67
2008	65
2009	59
2010	67
2011	67
2012	75
2013	80
2014	75
2015	70
2016	73
2017	75
2018	78
2019	75
2020	70
2021	63
2022	72