Year	% of children ages 12-23 months
1980	44
1981	43
1982	40
1983	41
1984	52
1985	40
1986	51
1987	62
1988	60
1989	65
1990	53
1991	88
1992	90
1993	82
1994	91
1995	91
1996	95
1997	95
1998	96
1999	96
2000	97
2001	97
2002	97
2003	98
2004	98
2005	98
2006	98
2007	98
2008	96
2009	95
2010	95
2011	97
2012	99
2013	83
2014	87
2015	87
2016	93
2017	85
2018	88
2019	82
2020	72
2021	78
2022	83