Definition
    
                                    Single-Age & DMY-Code 
a)	DMY-code = 1 & Single-Age = 000 
(Lived only less than 24 hours)
b)	DMY-code = 1 & Single-Age = 001-030 
(Lived only the number of days given in the Single-Age Field)
c)	DMY-code = 2 
(Lived only the number of months given in the Single-Age Field)
d)     DMY-code = 3 
(Lived only the numbers years given in the Single-Age field)
e)	DMY-code = 0 & Single-Age = 0 
(Age of death is unspecified)