Year	% of children ages 12-23 months
1981	50
1982	58
1983	66
1984	74
1985	82
1986	90
1987	50
1988	75
1989	75
1990	85
1991	67
1992	87
1993	70
1994	78
1995	85
1996	73
1997	76
1998	80
1999	82
2000	82
2001	82
2002	82
2003	82
2004	82
2005	88
2006	92
2007	92
2008	93
2009	95
2010	95
2011	95
2012	96
2013	96
2014	96
2015	96
2016	96
2017	96
2018	96
2019	96
2020	96
2021	96
2022	96