Year	% of children ages 12-23 months
1980	10
1981	26
1982	35
1983	31
1984	48
1985	41
1986	44
1987	51
1988	54
1989	55
1990	68
1991	59
1992	87
1993	85
1994	84
1995	83
1996	82
1997	81
1998	85
1999	79
2000	87
2001	89
2002	88
2003	87
2004	88
2005	92
2006	96
2007	96
2008	96
2009	94
2010	91
2011	88
2012	87
2013	87
2014	83
2015	78
2016	83
2017	85
2018	85
2019	85
2020	70
2021	72
2022	70