Year	% of children ages 12-23 months
1980	47
1981	57
1982	78
1983	88
1984	85
1985	75
1986	85
1987	94
1988	87
1989	81
1990	84
1991	92
1992	89
1993	87
1994	95
1995	97
1996	97
1997	98
1998	96
1999	97
2000	96
2001	95
2002	94
2003	93
2004	95
2005	96
2006	95
2007	95
2008	95
2009	95
2010	95
2011	95
2012	95
2013	95
2014	95
2015	95
2016	95
2017	95
2018	97
2019	96
2020	97
2021	96
2022	96