Year	% of children ages 12-23 months
1981	36
1982	33
1983	44
1984	26
1985	36
1986	55
1987	68
1988	51
1989	82
1990	86
1991	83
1992	80
1993	63
1994	48
1995	73
1996	73
1997	74
1998	65
1999	79
2000	80
2001	81
2002	81
2003	82
2004	83
2005	87
2006	92
2007	99
2008	92
2009	94
2010	96
2011	96
2012	96
2013	96
2014	95
2015	94
2016	94
2017	91
2018	90
2019	93
2020	93
2021	94
2022	91