Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2010 dataset :

       SRV: |
   PHYSICAL |
    THERAPY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,503       55.03       55.03
          0 |        379        3.79       58.82
          1 |      2,074       20.74       79.56
          2 |      1,523       15.23       94.79
          3 |        521        5.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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