Year	% of children ages 12-23 months
1980	32
1981	40
1982	2
1983	25
1984	22
1985	57
1986	61
1987	64
1988	69
1989	65
1990	84
1991	93
1992	91
1993	96
1994	96
1995	94
1996	94
1997	75
1998	77
1999	79
2000	81
2001	83
2002	85
2003	86
2004	88
2005	90
2006	92
2007	94
2008	95
2009	95
2010	96
2011	96
2012	98
2013	94
2014	99
2015	97
2016	97
2017	99
2018	95
2019	96
2020	96
2021	99
2022	99