Run PROC GAREABAR with VBAR statement.The VBAR=SITE option creates a vertical bar for each value of quarter. *SALESPERSONS sets the width of each of the bars. The SUMVAR=SALES option sets the height of each of the bars. WSTAT=PCT option sets the number of salespersons as a percentage of the whole.

proc gareabar data=totals;
   vbar quarter*salespersons/
      sumvar=sales
      wstat=pct;
run;
quit;