Year	% of children ages 12-23 months
1981	42
1982	34
1983	26
1984	49
1985	48
1986	65
1987	72
1988	77
1989	63
1990	92
1991	87
1992	68
1993	60
1994	83
1995	79
1996	68
1997	73
1998	73
1999	78
2000	82
2001	92
2002	92
2003	94
2004	96
2005	97
2006	97
2007	97
2008	99
2009	98
2010	98
2011	96
2012	96
2013	97
2014	95
2015	96
2016	96
2017	95
2018	95
2019	95
2020	96
2021	97
2022	97