Year	% of children ages 12-23 months
1982	1
1983	1
1984	1
1985	1
1986	3
1987	6
1988	13
1989	53
1990	65
1991	68
1992	69
1993	74
1994	78
1995	79
1996	69
1997	72
1998	71
1999	71
2000	74
2001	77
2002	75
2003	76
2004	81
2005	88
2006	83
2007	89
2008	92
2009	93
2010	88
2011	93
2012	88
2013	91
2014	94
2015	97
2016	97
2017	97
2018	97
2019	97
2020	97
2021	97
2022	97