Year	% of children ages 12-23 months
1982	9
1983	27
1984	44
1985	49
1986	51
1987	67
1988	77
1989	83
1990	85
1991	83
1992	81
1993	78
1994	75
1995	72
1996	76
1997	79
1998	80
1999	80
2000	78
2001	81
2002	82
2003	87
2004	92
2005	92
2006	92
2007	92
2008	90
2009	89
2010	87
2011	86
2012	84
2013	83
2014	81
2015	80
2016	80
2017	78
2018	77
2019	75
2020	72
2021	57
2022	69