Year	% of children ages 12-23 months
1980	98
1981	98
1982	90
1983	98
1984	98
1985	99
1986	99
1987	99
1988	99
1989	99
1990	99
1991	98
1992	92
1993	88
1994	93
1995	94
1996	95
1997	93
1998	95
1999	96
2000	89
2001	90
2002	92
2003	96
2004	95
2005	96
2006	96
2007	96
2008	96
2009	96
2010	97
2011	95
2012	94
2013	95
2014	93
2015	92
2016	92
2017	94
2018	93
2019	95
2020	88
2021	89
2022	91