Year	% of children ages 12-23 months
1980	7
1981	22
1982	23
1983	23
1984	19
1985	22
1986	35
1987	42
1988	47
1989	51
1990	58
1991	60
1992	62
1993	66
1994	70
1995	70
1996	71
1997	71
1998	76
1999	79
2000	88
2001	79
2002	78
2003	80
2004	80
2005	84
2006	84
2007	94
2008	93
2009	94
2010	94
2011	91
2012	92
2013	90
2014	98
2015	88
2016	93
2017	99
2018	97
2019	97
2020	94
2021	98
2022	99