Year	% of children ages 12-23 months
1981	9
1982	12
1983	14
1984	14
1985	14
1986	21
1987	30
1988	38
1989	42
1990	45
1991	49
1992	53
1993	56
1994	60
1995	59
1996	57
1997	56
1998	48
1999	50
2000	52
2001	55
2002	57
2003	59
2004	62
2005	64
2006	64
2007	73
2008	71
2009	79
2010	80
2011	82
2012	83
2013	84
2014	85
2015	89
2016	93
2017	94
2018	93
2019	93
2020	89
2021	91
2022	89