Year	% of children ages 12-23 months
1980	29
1981	40
1982	48
1983	56
1984	65
1985	73
1986	81
1987	87
1988	87
1989	84
1990	87
1991	85
1992	91
1993	88
1994	91
1995	92
1996	94
1997	95
1998	93
1999	83
2000	94
2001	99
2002	95
2003	96
2004	99
2005	95
2006	99
2007	95
2008	95
2009	95
2010	98
2011	98
2012	98
2013	97
2014	98
2015	94
2016	96
2017	93
2018	92
2019	87
2020	76
2021	76
2022	76