Year	% of children ages 12-23 months
1980	30
1981	18
1982	25
1983	24
1984	19
1985	54
1986	71
1987	71
1988	29
1989	65
1990	70
1991	72
1992	73
1993	75
1994	76
1995	78
1996	79
1997	79
1998	80
1999	83
2000	85
2001	88
2002	86
2003	83
2004	81
2005	79
2006	81
2007	82
2008	83
2009	84
2010	85
2011	87
2012	88
2013	83
2014	88
2015	90
2016	85
2017	86
2018	91
2019	96
2020	82
2021	88
2022	91