Year	% of children ages 12-23 months
1980	13
1981	14
1982	22
1983	19
1984	23
1985	27
1986	64
1987	37
1988	52
1989	86
1990	87
1991	84
1992	84
1993	86
1994	86
1995	85
1996	85
1997	84
1998	87
1999	86
2000	84
2001	80
2002	84
2003	83
2004	82
2005	81
2006	81
2007	81
2008	81
2009	82
2010	82
2011	80
2012	61
2013	58
2014	54
2015	53
2016	62
2017	67
2018	63
2019	65
2020	59
2021	59
2022	41