PROC TABULATE looks at the first element in the denominator definition, Gender, and
asks whether Gender contributes to the subtable. Because Gender does not contribute to
the subtable, PROC TABULATE looks at the next element in the denominator
definition, which is All. The variable All does contribute to this subtable, so PROC
TABULATE uses it as the denominator definition. All is a reserved class variable with
only one category. Therefore, this denominator definition tells PROC TABULATE to
use the frequency count of All as the denominator.
There is only one category in this subtable: all, all. The denominator ...
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