Year	% of children ages 12-23 months
1984	3
1985	20
1986	45
1987	60
1988	68
1989	76
1990	80
1991	79
1992	82
1993	86
1994	84
1995	87
1996	89
1997	94
1998	94
1999	95
2000	99
2001	99
2002	99
2003	99
2004	96
2005	99
2006	99
2007	98
2008	98
2009	97
2010	99
2011	99
2012	99
2013	99
2014	99
2015	99
2016	99
2017	99
2018	99
2019	99
2020	96
2021	97
2022	99