Year	% of children ages 12-23 months
1980	44
1981	49
1982	58
1983	61
1984	62
1985	66
1986	67
1987	75
1988	80
1989	80
1990	87
1991	80
1992	81
1993	81
1994	82
1995	85
1996	83
1997	88
1998	84
1999	86
2000	83
2001	83
2002	93
2003	96
2004	98
2005	98
2006	91
2007	91
2008	93
2009	94
2010	94
2011	91
2012	91
2013	94
2014	94
2015	94
2016	92
2017	86
2018	86
2019	83
2020	74
2021	81
2022	81