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