Year	% of children ages 12-23 months
1980	80
1981	77
1982	74
1983	71
1984	67
1985	64
1986	60
1987	67
1988	75
1989	83
1990	90
1991	82
1992	82
1993	85
1994	87
1995	84
1996	92
1997	99
1998	81
1999	83
2000	85
2001	85
2002	84
2003	84
2004	83
2005	82
2006	82
2007	79
2008	86
2009	89
2010	91
2011	93
2012	92
2013	92
2014	93
2015	93
2016	92
2017	93
2018	92
2019	92
2020	91
2021	91
2022	90