Year	% of children ages 12-23 months
1980	42
1981	64
1982	58
1983	56
1984	56
1985	55
1986	45
1987	86
1988	86
1989	79
1990	84
1991	72
1992	77
1993	76
1994	87
1995	67
1996	72
1997	79
1998	81
1999	79
2000	85
2001	88
2002	78
2003	68
2004	85
2005	90
2006	90
2007	96
2008	96
2009	96
2010	97
2011	97
2012	97
2013	98
2014	96
2015	97
2016	98
2017	96
2018	98
2019	99
2020	98
2021	95
2022	99