Year	% of children ages 12-23 months
1981	30
1982	39
1983	43
1984	50
1985	61
1986	74
1987	86
1988	89
1989	89
1990	89
1991	79
1992	93
1993	89
1994	96
1995	82
1996	82
1997	82
1998	83
1999	83
2000	84
2001	84
2002	85
2003	85
2004	86
2005	86
2006	87
2007	87
2008	88
2009	88
2010	89
2011	91
2012	95
2013	98
2014	98
2015	90
2016	90
2017	90
2018	90
2019	90
2020	83
2021	77
2022	97