Year	% of children ages 12-23 months
1980	13
1981	14
1982	15
1983	21
1984	25
1985	29
1986	86
1987	42
1988	59
1989	94
1990	91
1991	89
1992	89
1993	90
1994	89
1995	89
1996	88
1997	87
1998	87
1999	86
2000	84
2001	82
2002	84
2003	83
2004	81
2005	80
2006	80
2007	80
2008	79
2009	80
2010	80
2011	72
2012	45
2013	41
2014	43
2015	41
2016	42
2017	48
2018	47
2019	54
2020	49
2021	48
2022	46