Year	% of children ages 12-23 months
1980	73
1981	75
1982	78
1983	79
1984	78
1985	72
1986	81
1987	83
1988	81
1989	88
1990	89
1991	96
1992	94
1993	93
1994	97
1995	93
1996	95
1997	94
1998	97
1999	97
2000	96
2001	97
2002	98
2003	99
2004	95
2005	93
2006	97
2007	97
2008	97
2009	96
2010	98
2011	97
2012	98
2013	98
2014	98
2015	98
2016	98
2017	98
2018	99
2019	99
2020	99
2021	99
2022	99