Year	% of children ages 12-23 months
1982	15
1983	15
1984	15
1985	15
1986	15
1987	15
1988	16
1989	17
1990	17
1991	36
1992	52
1993	53
1994	53
1995	54
1996	48
1997	47
1998	56
1999	43
2000	46
2001	50
2002	53
2003	57
2004	60
2005	59
2006	57
2007	63
2008	60
2009	57
2010	64
2011	63
2012	57
2013	50
2014	44
2015	47
2016	47
2017	47
2018	47
2019	47
2020	47
2021	47
2022	47