Year	% of children ages 12-23 months
1980	11
1981	13
1982	12
1983	10
1984	6
1985	33
1986	42
1987	35
1988	28
1989	52
1990	41
1991	43
1992	45
1993	52
1994	58
1995	64
1996	61
1997	58
1998	61
1999	77
2000	75
2001	71
2002	77
2003	88
2004	84
2005	85
2006	83
2007	84
2008	88
2009	93
2010	91
2011	95
2012	93
2013	87
2014	85
2015	89
2016	87
2017	84
2018	83
2019	75
2020	68
2021	70
2022	69