Year	% of children ages 12-23 months
1982	3
1983	6
1984	8
1985	21
1986	26
1987	23
1988	59
1989	31
1990	31
1991	35
1992	39
1993	44
1994	48
1995	49
1996	50
1997	52
1998	53
1999	54
2000	55
2001	55
2002	56
2003	57
2004	57
2005	58
2006	59
2007	60
2008	62
2009	63
2010	64
2011	65
2012	66
2013	68
2014	69
2015	69
2016	69
2017	69
2018	69
2019	65
2020	65
2021	65
2022	65