Year	% of children ages 12-23 months
1981	17
1982	38
1983	59
1984	55
1985	50
1986	87
1987	88
1988	80
1989	82
1990	84
1991	91
1992	85
1993	83
1994	23
1995	83
1996	89
1997	73
1998	79
1999	85
2000	90
2001	77
2002	88
2003	96
2004	89
2005	95
2006	99
2007	97
2008	97
2009	97
2010	97
2011	97
2012	98
2013	98
2014	98
2015	98
2016	98
2017	98
2018	97
2019	98
2020	91
2021	88
2022	98