Year	% of children ages 12-23 months
1980	24
1981	31
1982	45
1983	34
1984	54
1985	51
1986	50
1987	47
1988	53
1989	57
1990	60
1991	54
1992	69
1993	85
1994	83
1995	81
1996	79
1997	77
1998	89
1999	99
2000	99
2001	99
2002	99
2003	99
2004	99
2005	93
2006	97
2007	98
2008	98
2009	97
2010	95
2011	94
2012	96
2013	97
2014	85
2015	84
2016	86
2017	81
2018	83
2019	83
2020	81
2021	65
2022	74