Year	% of children ages 12-23 months
1980	35
1981	33
1982	37
1983	23
1984	21
1985	64
1986	60
1987	54
1988	70
1989	85
1990	75
1991	89
1992	88
1993	79
1994	90
1995	90
1996	93
1997	91
1998	96
1999	94
2000	96
2001	95
2002	96
2003	96
2004	96
2005	96
2006	96
2007	96
2008	96
2009	96
2010	95
2011	98
2012	99
2013	89
2014	97
2015	97
2016	96
2017	76
2018	97
2019	73
2020	92
2021	99
2022	86