Year	% of children ages 12-23 months
1980	21
1981	40
1982	51
1983	43
1984	43
1985	49
1986	85
1987	53
1988	59
1989	71
1990	86
1991	76
1992	69
1993	80
1994	82
1995	83
1996	81
1997	85
1998	84
1999	82
2000	96
2001	94
2002	88
2003	96
2004	97
2005	95
2006	99
2007	96
2008	96
2009	97
2010	98
2011	98
2012	96
2013	99
2014	95
2015	96
2016	95
2017	90
2018	97
2019	96
2020	82
2021	79
2022	81