Frequencies for first 10,000 rows of prov2370 variable in pos1993 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,454       74.54       74.54
          0 |        272        2.72       77.26
          1 |      1,086       10.86       88.12
          2 |        959        9.59       97.71
          3 |        229        2.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016