Year	% of children ages 12-23 months
1983	11
1984	23
1985	20
1986	35
1987	68
1988	61
1989	61
1990	70
1991	80
1992	82
1993	81
1994	95
1995	97
1996	97
1997	98
1998	96
1999	97
2000	96
2001	95
2002	94
2003	93
2004	95
2005	96
2006	95
2007	95
2008	95
2009	95
2010	95
2011	95
2012	95
2013	95
2014	92
2015	93
2016	94
2017	96
2018	98
2019	97
2020	95
2021	96
2022	96