Year	% of children ages 12-23 months
1980	22
1981	10
1982	24
1983	34
1984	53
1985	65
1986	79
1987	86
1988	87
1989	94
1990	98
1991	96
1992	96
1993	95
1994	97
1995	98
1996	98
1997	98
1998	98
1999	99
2000	99
2001	99
2002	99
2003	98
2004	98
2005	98
2006	96
2007	97
2008	98
2009	99
2010	99
2011	99
2012	99
2013	99
2014	99
2015	99
2016	99
2017	99
2018	99
2019	99
2020	99
2021	99
2022	97