Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2003 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,601       66.01       66.01
          0 |        257        2.57       68.58
          1 |      1,309       13.09       81.67
          2 |      1,303       13.03       94.70
          3 |        530        5.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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