Year	% of children ages 12-23 months
1980	49
1981	49
1982	55
1983	59
1984	52
1985	67
1986	69
1987	69
1988	73
1989	75
1990	75
1991	64
1992	60
1993	55
1994	47
1995	38
1996	42
1997	18
1998	21
1999	23
2000	34
2001	35
2002	37
2003	50
2004	65
2005	54
2006	61
2007	59
2008	69
2009	63
2010	75
2011	83
2012	80
2013	80
2014	80
2015	80
2016	67
2017	70
2018	75
2019	73
2020	68
2021	68
2022	65