Year	% of children ages 12-23 months
1980	47
1981	44
1982	61
1983	59
1984	53
1985	58
1986	82
1987	85
1988	61
1989	79
1990	91
1991	82
1992	74
1993	85
1994	88
1995	83
1996	85
1997	86
1998	87
1999	87
2000	91
2001	96
2002	89
2003	96
2004	97
2005	96
2006	98
2007	96
2008	94
2009	97
2010	96
2011	95
2012	98
2013	95
2014	95
2015	94
2016	95
2017	88
2018	96
2019	98
2020	79
2021	83
2022	84