Year	% of children ages 12-23 months
1985	58
1986	66
1987	67
1988	68
1989	76
1990	76
1991	71
1992	66
1993	63
1994	60
1995	57
1996	57
1997	56
1998	56
1999	55
2000	55
2001	55
2002	55
2003	55
2004	55
2005	55
2006	55
2007	62
2008	67
2009	63
2010	62
2011	72
2012	71
2013	70
2014	61
2015	68
2016	64
2017	63
2018	59
2019	62
2020	53
2021	64
2022	52