Year	% of children ages 12-23 months
1980	2
1981	3
1982	5
1983	15
1984	23
1985	30
1986	34
1987	36
1988	38
1989	40
1990	54
1991	50
1992	42
1993	37
1994	39
1995	58
1996	46
1997	52
1998	54
1999	57
2000	59
2001	61
2002	63
2003	66
2004	68
2005	63
2006	59
2007	54
2008	53
2009	52
2010	52
2011	63
2012	64
2013	65
2014	69
2015	72
2016	75
2017	75
2018	80
2019	84
2020	80
2021	83
2022	85