The start and end are specified as either date specifications
or case (observation) numbers.
Date specifications and case numbers cannot be mixed
on one PREDICT command.
Keyword THRU is required if the end of the range is specified.
Keyword THRU by itself defines a PREDICT range starting with the first observation after the use range and
ending with the end of the series. If USE has not been specified, PREDICT THRU is meaningless.