Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2007 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,479       54.79       54.79
          0 |        358        3.58       58.37
          1 |      2,031       20.31       78.68
          2 |      1,539       15.39       94.07
          3 |        593        5.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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