Year	% of children ages 12-23 months
1980	48
1981	71
1982	79
1983	80
1984	88
1985	91
1986	93
1987	95
1988	97
1989	98
1990	66
1991	75
1992	85
1993	95
1994	98
1995	98
1996	99
1997	95
1998	99
1999	96
2000	99
2001	99
2002	97
2003	97
2004	97
2005	99
2006	99
2007	99
2008	99
2009	99
2010	98
2011	99
2012	99
2013	99
2014	94
2015	93
2016	99
2017	99
2018	98
2019	97
2020	95
2021	94
2022	99