Year	% of children ages 12-23 months
1983	14
1984	31
1985	48
1986	59
1987	65
1988	72
1989	78
1990	78
1991	72
1992	66
1993	67
1994	69
1995	70
1996	62
1997	54
1998	50
1999	45
2000	45
2001	45
2002	45
2003	45
2004	45
2005	45
2006	45
2007	81
2008	82
2009	76
2010	67
2011	75
2012	82
2013	79
2014	70
2015	80
2016	75
2017	75
2018	70
2019	70
2020	63
2021	75
2022	60