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

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,948       69.48       69.48
          0 |        255        2.55       72.03
          1 |      1,131       11.31       83.34
          2 |      1,249       12.49       95.83
          3 |        417        4.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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