Year	% of children ages 12-23 months
1980	16
1981	23
1982	27
1983	24
1984	33
1985	39
1986	45
1987	51
1988	47
1989	68
1990	70
1991	75
1992	81
1993	81
1994	81
1995	80
1996	80
1997	80
1998	73
1999	79
2000	83
2001	87
2002	85
2003	86
2004	79
2005	86
2006	88
2007	93
2008	97
2009	98
2010	98
2011	98
2012	98
2013	98
2014	98
2015	98
2016	98
2017	98
2018	98
2019	98
2020	92
2021	87
2022	92