Year	% of children ages 12-23 months
1980	25
1981	43
1982	56
1983	68
1984	76
1985	61
1986	98
1987	80
1988	65
1989	87
1990	80
1991	85
1992	90
1993	89
1994	91
1995	95
1996	80
1997	95
1998	97
1999	88
2000	97
2001	96
2002	98
2003	97
2004	83
2005	99
2006	91
2007	96
2008	99
2009	99
2010	97
2011	95
2012	97
2013	97
2014	97
2015	92
2016	96
2017	96
2018	95
2019	94
2020	72
2021	77
2022	77