Year	% of children ages 12-23 months
1980	16
1981	20
1982	23
1983	23
1984	28
1985	48
1986	50
1987	43
1988	60
1989	58
1990	72
1991	71
1992	83
1993	87
1994	87
1995	90
1996	94
1997	90
1998	94
1999	99
2000	98
2001	90
2002	95
2003	94
2004	86
2005	77
2006	94
2007	93
2008	93
2009	93
2010	93
2011	91
2012	95
2013	88
2014	88
2015	90
2016	89
2017	89
2018	88
2019	88
2020	72
2021	82
2022	82