Year	% of children ages 12-23 months
1982	20
1983	23
1984	18
1985	26
1986	22
1987	34
1988	46
1989	50
1990	66
1991	63
1992	66
1993	74
1994	53
1995	60
1996	61
1997	65
1998	64
1999	62
2000	61
2001	59
2002	58
2003	56
2004	55
2005	53
2006	52
2007	56
2008	61
2009	65
2010	70
2011	75
2012	79
2013	84
2014	90
2015	76
2016	84
2017	80
2018	75
2019	80
2020	78
2021	50
2022	70