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