Year	% of children ages 12-23 months
1983	6
1984	13
1985	26
1986	45
1987	48
1988	51
1989	54
1990	58
1991	61
1992	65
1993	68
1994	66
1995	63
1996	79
1997	77
1998	77
1999	77
2000	76
2001	76
2002	72
2003	74
2004	76
2005	77
2006	79
2007	76
2008	76
2009	74
2010	78
2011	80
2012	82
2013	87
2014	86
2015	87
2016	88
2017	90
2018	89
2019	88
2020	76
2021	72
2022	84