Year	% of children ages 12-23 months
1984	11
1985	27
1986	43
1987	74
1988	62
1989	78
1990	73
1991	69
1992	64
1993	60
1994	57
1995	53
1996	48
1997	43
1998	40
1999	57
2000	58
2001	40
2002	48
2003	68
2004	70
2005	70
2006	78
2007	71
2008	63
2009	66
2010	68
2011	72
2012	72
2013	72
2014	77
2015	75
2016	73
2017	77
2018	71
2019	75
2020	69
2021	70
2022	71