Run PROC GAREABAR with an HBAR statement. Because SITE*SALESPERSONS and WSTAT=PERCENT, the percentage of salespersons is shown by the relative thickness of each bar along the vertical axis.

The SUBGROUP=QUARTER option and the RSTAT=PCT option, request that sales for each quarter is displayed as percentages along the horizontal axis.

proc gareabar data=totals;
   hbar site*salespersons /
      sumvar=sales
      subgroup=quarter
      rstat=PCT
      wstat=PCT;
run;
quit;