Year	% of children ages 12-23 months
1980	2
1981	4
1982	4
1983	6
1984	8
1985	13
1986	15
1987	22
1988	34
1989	48
1990	69
1991	53
1992	46
1993	51
1994	31
1995	40
1996	43
1997	41
1998	66
1999	74
2000	70
2001	72
2002	62
2003	64
2004	74
2005	73
2006	65
2007	71
2008	69
2009	65
2010	68
2011	66
2012	63
2013	70
2014	67
2015	67
2016	70
2017	65
2018	64
2019	67
2020	68
2021	71
2022	73