* InsertSum Example
  Insert a summary statistic computed by proc means 
  or other proc into a dataset;

options ls=64 nodate pageno=1;

data original;
   input region $ store_count;
   datalines;
East  543
North 245
South 354
West  456
;

proc means data=original noprint;
   output out=summary sum=total;

proc print data=original;
proc print data=summary;

data augmented;
   if _n_ = 1 then set summary;
   set original;
   percent = 100 * store_count / total;
   keep region store_count percent;

proc print data=augmented;
   format percent 5.2;

run;
quit;