Year	% of children ages 12-23 months
1980	34
1981	36
1982	43
1983	42
1984	45
1985	45
1986	44
1987	44
1988	43
1989	65
1990	65
1991	67
1992	68
1993	70
1994	71
1995	73
1996	74
1997	76
1998	84
1999	86
2000	86
2001	84
2002	83
2003	86
2004	89
2005	90
2006	91
2007	92
2008	93
2009	94
2010	94
2011	95
2012	95
2013	96
2014	96
2015	95
2016	95
2017	95
2018	94
2019	94
2020	94
2021	94
2022	93