Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2008 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,343       53.43       53.43
          0 |        369        3.69       57.12
          1 |      2,089       20.89       78.01
          2 |      1,630       16.30       94.31
          3 |        569        5.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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