Year	% of children ages 12-23 months
1980	32
1981	29
1982	41
1983	33
1984	33
1985	51
1986	57
1987	57
1988	88
1989	82
1990	91
1991	88
1992	97
1993	99
1994	95
1995	98
1996	99
1997	99
1998	99
1999	99
2000	99
2001	96
2002	99
2003	99
2004	99
2005	95
2006	98
2007	99
2008	99
2009	99
2010	99
2011	99
2012	99
2013	98
2014	99
2015	98
2016	99
2017	99
2018	99
2019	99
2020	99
2021	98
2022	99