Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2002 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,746       67.46       67.46
          0 |        249        2.49       69.95
          1 |      1,252       12.52       82.47
          2 |      1,285       12.85       95.32
          3 |        468        4.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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