Year	% of children ages 12-23 months
1980	42
1981	42
1982	47
1983	50
1984	53
1985	54
1986	71
1987	72
1988	72
1989	79
1990	79
1991	74
1992	67
1993	60
1994	55
1995	50
1996	37
1997	23
1998	26
1999	29
2000	33
2001	31
2002	41
2003	50
2004	67
2005	62
2006	73
2007	72
2008	79
2009	78
2010	74
2011	82
2012	85
2013	85
2014	90
2015	80
2016	71
2017	69
2018	75
2019	79
2020	73
2021	77
2022	78