Year	% of children ages 12-23 months
1980	35
1981	45
1982	53
1983	58
1984	70
1985	75
1986	64
1987	67
1988	64
1989	77
1990	83
1991	81
1992	79
1993	93
1994	90
1995	86
1996	83
1997	88
1998	90
1999	83
2000	88
2001	85
2002	91
2003	90
2004	91
2005	93
2006	93
2007	94
2008	93
2009	98
2010	95
2011	93
2012	97
2013	98
2014	98
2015	95
2016	97
2017	97
2018	95
2019	99
2020	99
2021	98
2022	98