Year	% of children ages 12-23 months
1981	39
1982	17
1983	71
1984	75
1985	73
1986	78
1987	70
1988	83
1989	73
1990	65
1991	84
1992	61
1993	61
1994	72
1995	85
1996	87
1997	79
1998	82
1999	85
2000	84
2001	82
2002	73
2003	69
2004	86
2005	91
2006	83
2007	85
2008	86
2009	88
2010	87
2011	79
2012	64
2013	81
2014	70
2015	76
2016	76
2017	76
2018	77
2019	64
2020	45
2021	58
2022	74