Year	% of children ages 12-23 months
1984	9
1985	16
1986	22
1987	29
1988	36
1989	47
1990	56
1991	39
1992	43
1993	29
1994	44
1995	34
1996	26
1997	21
1998	32
1999	31
2000	29
2001	27
2002	25
2003	29
2004	33
2005	36
2006	40
2007	42
2008	53
2009	63
2010	54
2011	48
2012	42
2013	43
2014	43
2015	42
2016	53
2017	55
2018	61
2019	66
2020	62
2021	62
2022	62