Year	% of children ages 12-23 months
1980	68
1981	70
1982	64
1983	80
1984	77
1985	69
1986	71
1987	90
1988	98
1989	98
1990	97
1991	99
1992	97
1993	96
1994	96
1995	97
1996	97
1997	86
1998	87
1999	89
2000	90
2001	91
2002	93
2003	94
2004	95
2005	96
2006	98
2007	99
2008	99
2009	99
2010	99
2011	99
2012	99
2013	99
2014	99
2015	99
2016	95
2017	91
2018	94
2019	97
2020	99
2021	99
2022	99