Year	% of children ages 12-23 months
1980	67
1981	79
1982	83
1983	89
1984	89
1985	90
1986	91
1987	92
1988	94
1989	94
1990	71
1991	80
1992	88
1993	97
1994	99
1995	99
1996	99
1997	96
1998	95
1999	94
2000	98
2001	99
2002	99
2003	99
2004	98
2005	99
2006	99
2007	99
2008	99
2009	99
2010	98
2011	99
2012	98
2013	99
2014	95
2015	99
2016	99
2017	99
2018	91
2019	92
2020	93
2021	94
2022	96