Year	% of children ages 12-23 months
1984	31
1985	31
1986	31
1987	30
1988	31
1989	41
1990	56
1991	57
1992	54
1993	52
1994	55
1995	57
1996	65
1997	68
1998	66
1999	57
2000	68
2001	71
2002	71
2003	70
2004	78
2005	84
2006	73
2007	67
2008	63
2009	67
2010	64
2011	49
2012	74
2013	69
2014	59
2015	67
2016	73
2017	70
2018	75
2019	73
2020	66
2021	68
2022	65