Year	% of children ages 12-23 months
1980	29
1981	28
1982	21
1983	19
1984	25
1985	43
1986	60
1987	91
1988	74
1989	76
1990	77
1991	78
1992	80
1993	81
1994	82
1995	83
1996	90
1997	90
1998	89
1999	87
2000	86
2001	86
2002	86
2003	86
2004	86
2005	86
2006	87
2007	87
2008	87
2009	87
2010	87
2011	87
2012	86
2013	86
2014	86
2015	90
2016	90
2017	90
2018	90
2019	86
2020	86
2021	86
2022	86