Year	% of children ages 12-23 months
1980	72
1981	95
1982	83
1983	72
1984	60
1985	54
1986	80
1987	82
1988	83
1989	54
1990	54
1991	85
1992	89
1993	89
1994	90
1995	90
1996	90
1997	90
1998	89
1999	88
2000	89
2001	91
2002	92
2003	94
2004	95
2005	96
2006	98
2007	99
2008	99
2009	99
2010	99
2011	99
2012	99
2013	99
2014	99
2015	99
2016	99
2017	99
2018	99
2019	99
2020	99
2021	99
2022	99