Year	% of children ages 12-23 months
1980	39
1981	48
1982	55
1983	38
1984	38
1985	62
1986	55
1987	55
1988	83
1989	79
1990	85
1991	84
1992	96
1993	96
1994	97
1995	95
1996	99
1997	95
1998	99
1999	99
2000	99
2001	96
2002	99
2003	99
2004	96
2005	94
2006	99
2007	97
2008	98
2009	99
2010	99
2011	99
2012	98
2013	98
2014	99
2015	99
2016	99
2017	99
2018	99
2019	99
2020	99
2021	99
2022	99