Frequencies for first 10,000 rows of pt_srvc_cd variable in pos2009 dataset :

       SRV: |
   PHYSICAL |
    THERAPY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,414       54.14       54.14
          0 |        383        3.83       57.97
          1 |      2,100       21.00       78.97
          2 |      1,561       15.61       94.58
          3 |        542        5.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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