Year	% of children ages 12-23 months
1982	68
1983	51
1984	56
1985	40
1986	42
1987	52
1988	55
1989	69
1990	73
1991	76
1992	73
1993	92
1994	83
1995	77
1996	91
1997	82
1998	93
1999	87
2000	86
2001	92
2002	93
2003	89
2004	88
2005	92
2006	90
2007	96
2008	95
2009	97
2010	95
2011	98
2012	99
2013	99
2014	99
2015	99
2016	99
2017	99
2018	98
2019	98
2020	98
2021	95
2022	95