Year	% of children ages 12-23 months
1980	24
1981	39
1982	34
1983	51
1984	58
1985	60
1986	74
1987	81
1988	82
1989	85
1990	86
1991	85
1992	84
1993	91
1994	93
1995	90
1996	92
1997	90
1998	86
1999	89
2000	93
2001	99
2002	99
2003	96
2004	98
2005	99
2006	95
2007	92
2008	91
2009	90
2010	94
2011	92
2012	96
2013	93
2014	92
2015	91
2016	99
2017	93
2018	97
2019	96
2020	96
2021	90
2022	98