Year	% of children ages 12-23 months
1980	16
1981	20
1982	26
1983	42
1984	61
1985	61
1986	48
1987	58
1988	74
1989	78
1990	88
1991	84
1992	78
1993	88
1994	85
1995	85
1996	85
1997	84
1998	73
1999	74
2000	79
2001	80
2002	81
2003	92
2004	89
2005	93
2006	93
2007	94
2008	92
2009	92
2010	88
2011	85
2012	91
2013	91
2014	90
2015	91
2016	91
2017	92
2018	92
2019	94
2020	88
2021	86
2022	87