Year	% of children ages 12-23 months
1980	63
1981	70
1982	75
1983	79
1984	82
1985	85
1986	91
1987	87
1988	87
1989	87
1990	87
1991	88
1992	88
1993	88
1994	88
1995	89
1996	89
1997	89
1998	89
1999	90
2000	91
2001	91
2002	92
2003	92
2004	93
2005	93
2006	94
2007	95
2008	95
2009	96
2010	96
2011	97
2012	97
2013	97
2014	97
2015	97
2016	97
2017	97
2018	97
2019	97
2020	87
2021	97
2022	90