Year	% of children ages 12-23 months
1984	42
1985	18
1986	71
1987	71
1988	40
1989	85
1990	87
1991	40
1992	51
1993	56
1994	59
1995	69
1996	43
1997	49
1998	67
1999	69
2000	70
2001	70
2002	71
2003	67
2004	76
2005	67
2006	66
2007	65
2008	76
2009	79
2010	72
2011	79
2012	85
2013	85
2014	86
2015	90
2016	90
2017	90
2018	90
2019	90
2020	90
2021	90
2022	86