Year	% of children ages 12-23 months
1981	3
1982	3
1983	4
1984	4
1985	6
1986	7
1987	16
1988	16
1989	26
1990	49
1991	21
1992	13
1993	28
1994	57
1995	57
1996	55
1997	55
1998	42
1999	28
2000	30
2001	33
2002	35
2003	38
2004	40
2005	44
2006	46
2007	50
2008	54
2009	58
2010	61
2011	65
2012	62
2013	59
2014	61
2015	63
2016	66
2017	68
2018	67
2019	68
2020	71
2021	65
2022	65