Year	% of children ages 12-23 months
1981	13
1982	55
1983	97
1984	95
1985	86
1986	94
1987	89
1988	94
1989	97
1990	99
1991	98
1992	96
1993	96
1994	96
1995	97
1996	99
1997	98
1998	99
1999	99
2000	98
2001	96
2002	99
2003	99
2004	99
2005	99
2006	99
2007	99
2008	99
2009	99
2010	99
2011	99
2012	98
2013	98
2014	99
2015	97
2016	96
2017	97
2018	99
2019	99
2020	97
2021	94
2022	97