Year	% of children ages 12-23 months
1980	72
1981	75
1982	79
1983	83
1984	86
1985	90
1986	92
1987	95
1988	96
1989	96
1990	94
1991	99
1992	94
1993	94
1994	96
1995	95
1996	96
1997	98
1998	98
1999	97
2000	97
2001	99
2002	98
2003	97
2004	98
2005	98
2006	98
2007	97
2008	97
2009	98
2010	99
2011	99
2012	99
2013	99
2014	99
2015	98
2016	99
2017	97
2018	99
2019	99
2020	98
2021	98
2022	97