Year	% of children ages 12-23 months
1980	13
1981	26
1982	28
1983	43
1984	51
1985	51
1986	45
1987	59
1988	74
1989	81
1990	82
1991	78
1992	74
1993	94
1994	84
1995	95
1996	90
1997	80
1998	78
1999	79
2000	88
2001	93
2002	93
2003	93
2004	92
2005	94
2006	95
2007	95
2008	92
2009	95
2010	88
2011	88
2012	94
2013	92
2014	91
2015	94
2016	93
2017	93
2018	95
2019	95
2020	90
2021	86
2022	88