Year	% of children ages 12-23 months
1980	56
1981	56
1982	61
1983	66
1984	74
1985	82
1986	81
1987	79
1988	80
1989	81
1990	82
1991	84
1992	85
1993	86
1994	87
1995	88
1996	87
1997	87
1998	88
1999	88
2000	83
2001	78
2002	84
2003	90
2004	90
2005	89
2006	89
2007	88
2008	88
2009	91
2010	93
2011	96
2012	95
2013	93
2014	88
2015	83
2016	87
2017	87
2018	87
2019	87
2020	87
2021	87
2022	87