Year	% of children ages 12-23 months
1983	68
1984	68
1985	68
1986	68
1987	68
1988	77
1989	85
1990	86
1991	86
1992	86
1993	86
1994	86
1995	87
1996	87
1997	85
1998	82
1999	88
2000	91
2001	92
2002	94
2003	94
2004	94
2005	94
2006	94
2007	94
2008	94
2009	94
2010	94
2011	94
2012	94
2013	94
2014	94
2015	95
2016	95
2017	94
2018	94
2019	94
2020	93
2021	93
2022	96