Year	% of children ages 12-23 months
1980	48
1981	49
1982	55
1983	94
1984	82
1985	85
1986	80
1987	99
1988	89
1989	98
1990	94
1991	99
1992	99
1993	96
1994	99
1995	99
1996	99
1997	96
1998	99
1999	96
2000	94
2001	96
2002	98
2003	99
2004	99
2005	98
2006	96
2007	97
2008	98
2009	99
2010	99
2011	99
2012	99
2013	99
2014	99
2015	99
2016	99
2017	99
2018	99
2019	99
2020	98
2021	99
2022	99