Year	% of children ages 12-23 months
1980	76
1981	72
1982	73
1983	73
1984	83
1985	72
1986	70
1987	67
1988	69
1989	80
1990	90
1991	81
1992	81
1993	83
1994	84
1995	89
1996	88
1997	86
1998	81
1999	88
2000	90
2001	90
2002	90
2003	90
2004	89
2005	89
2006	89
2007	88
2008	89
2009	92
2010	93
2011	95
2012	93
2013	92
2014	93
2015	92
2016	92
2017	94
2018	93
2019	92
2020	92
2021	90
2022	89