Year	% of children ages 12-23 months
1980	26
1981	62
1982	54
1983	60
1984	65
1985	75
1986	70
1987	79
1988	82
1989	77
1990	82
1991	82
1992	87
1993	81
1994	85
1995	89
1996	89
1997	90
1998	91
1999	90
2000	90
2001	91
2002	96
2003	91
2004	94
2005	95
2006	92
2007	88
2008	90
2009	90
2010	90
2011	90
2012	92
2013	92
2014	92
2015	96
2016	97
2017	89
2018	99
2019	93
2020	96
2021	94
2022	93