Year	% of children ages 12-23 months
1980	26
1981	10
1982	22
1983	69
1984	62
1985	62
1986	62
1987	60
1988	73
1989	79
1990	79
1991	84
1992	86
1993	86
1994	86
1995	87
1996	90
1997	87
1998	89
1999	87
2000	91
2001	92
2002	99
2003	93
2004	99
2005	99
2006	99
2007	92
2008	96
2009	99
2010	99
2011	98
2012	97
2013	97
2014	99
2015	99
2016	99
2017	99
2018	99
2019	99
2020	90
2021	99
2022	99