Year	% of children ages 12-23 months
1980	36
1981	27
1982	28
1983	29
1984	34
1985	39
1986	80
1987	80
1988	69
1989	58
1990	69
1991	71
1992	73
1993	75
1994	74
1995	72
1996	72
1997	73
1998	75
1999	83
2000	78
2001	72
2002	82
2003	79
2004	79
2005	87
2006	89
2007	85
2008	82
2009	82
2010	88
2011	84
2012	85
2013	83
2014	91
2015	85
2016	87
2017	84
2018	87
2019	89
2020	82
2021	84
2022	88