Year	% of children ages 12-23 months
1980	41
1981	41
1982	41
1983	41
1984	47
1985	74
1986	78
1987	76
1988	85
1989	86
1990	86
1991	89
1992	89
1993	89
1994	89
1995	89
1996	92
1997	92
1998	98
1999	96
2000	98
2001	97
2002	97
2003	98
2004	97
2005	98
2006	98
2007	97
2008	92
2009	95
2010	96
2011	96
2012	93
2013	96
2014	93
2015	92
2016	95
2017	94
2018	94
2019	95
2020	94
2021	96
2022	96