Year	% of children ages 12-23 months
1980	50
1981	43
1982	45
1983	42
1984	41
1985	56
1986	48
1987	54
1988	51
1989	50
1990	61
1991	63
1992	61
1993	62
1994	94
1995	47
1996	64
1997	68
1998	92
1999	84
2000	84
2001	98
2002	83
2003	83
2004	80
2005	76
2006	82
2007	87
2008	93
2009	87
2010	79
2011	86
2012	87
2013	85
2014	89
2015	92
2016	88
2017	96
2018	74
2019	93
2020	76
2021	68
2022	68