Year	% of children ages 12-23 months
1980	61
1981	43
1982	37
1983	49
1984	60
1985	71
1986	72
1987	72
1988	69
1989	81
1990	82
1991	86
1992	88
1993	90
1994	91
1995	92
1996	92
1997	92
1998	94
1999	92
2000	80
2001	93
2002	96
2003	92
2004	96
2005	97
2006	96
2007	94
2008	97
2009	99
2010	97
2011	93
2012	92
2013	97
2014	89
2015	99
2016	98
2017	97
2018	98
2019	98
2020	89
2021	98
2022	98