Year	% of children ages 12-23 months
1984	1
1985	6
1986	18
1987	28
1988	36
1989	44
1990	47
1991	54
1992	54
1993	54
1994	63
1995	55
1996	46
1997	46
1998	51
1999	55
2000	57
2001	59
2002	61
2003	65
2004	79
2005	74
2006	71
2007	81
2008	70
2009	63
2010	66
2011	62
2012	62
2013	64
2014	66
2015	60
2016	62
2017	55
2018	68
2019	60
2020	55
2021	44
2022	44