Extra step yes, but to me it is not a burdensome requirement.
Example: using SASHELP.CLASS, create a frequency table of ages that includes age 17 (there are zero age 17s in the data set)
data class;
set sashelp.class end=eof;
weight=1;
output;
if eof then do;
age=17;
weight=0;
output;
end;
run;
proc freq data=class;
tables age;
weight weight/zeros;
run;
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