Year	% of children ages 12-23 months
1981	28
1982	40
1983	54
1984	27
1985	32
1986	59
1987	54
1988	46
1989	73
1990	74
1991	74
1992	69
1993	69
1994	42
1995	80
1996	79
1997	77
1998	68
1999	70
2000	72
2001	73
2002	75
2003	76
2004	78
2005	87
2006	92
2007	88
2008	84
2009	91
2010	92
2011	93
2012	93
2013	98
2014	94
2015	93
2016	93
2017	90
2018	88
2019	92
2020	90
2021	90
2022	89