Year	% of children ages 12-23 months
1980	57
1981	73
1982	66
1983	68
1984	73
1985	67
1986	67
1987	64
1988	62
1989	60
1990	78
1991	85
1992	91
1993	85
1994	77
1995	87
1996	80
1997	99
1998	95
1999	99
2000	99
2001	99
2002	96
2003	97
2004	97
2005	98
2006	99
2007	99
2008	99
2009	99
2010	99
2011	99
2012	99
2013	98
2014	97
2015	96
2016	95
2017	87
2018	92
2019	91
2020	79
2021	73
2022	81