Year	% of children ages 12-23 months
1984	5
1985	26
1986	45
1987	52
1988	63
1989	66
1990	80
1991	79
1992	74
1993	80
1994	86
1995	91
1996	92
1997	93
1998	96
1999	96
2000	94
2001	94
2002	94
2003	96
2004	96
2005	96
2006	96
2007	96
2008	98
2009	98
2010	98
2011	98
2012	98
2013	99
2014	99
2015	99
2016	99
2017	99
2018	96
2019	96
2020	96
2021	96
2022	96