Print the report, suppress the printing of observation numbers, and print the total number of observations for the selected variables. NOOBS suppresses the printing of observation numbers at the beginning of the rows. SUMLABEL prints the BY variable label on the summary line of each. N= prints the number of observations in a BY group at the end of that BY group and (because of the SUM statement) prints the number
of observations in the data set at the end of the report. The first piece of explanatory text that N= provides precedes the number for each BY group. The second piece of explanatory text that N= provides precedes the number for the entire data set.

proc print data=exprev noobs label sumlabel
           n='Number of observations for the order type: '
          'Number of observations for the data set: ';