Frequencies for first 10,000 rows of ped_srvc_cd variable in pos2000 dataset :

       srv: |
  pediatric |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |        557        5.57       94.28
          1 |        528        5.28       99.56
          2 |         33        0.33       99.89
          3 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017