Year	% of children ages 12-23 months
1985	3
1986	3
1987	10
1988	19
1989	48
1990	77
1991	77
1992	76
1993	76
1994	77
1995	79
1996	80
1997	81
1998	81
1999	33
2000	35
2001	37
2002	39
2003	41
2004	43
2005	44
2006	46
2007	48
2008	50
2009	52
2010	54
2011	54
2012	54
2013	53
2014	53
2015	40
2016	53
2017	53
2018	53
2019	53
2020	53
2021	53
2022	53