Frequencies for first 10,000 rows of prov2370 variable in pos1991 dataset :

       srv: |
   physical |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,383       43.83       43.83
          0 |        555        5.55       49.38
          1 |      2,230       22.30       71.68
          2 |      1,143       11.43       83.11
          3 |        175        1.75       84.86
          4 |        153        1.53       86.39
          5 |      1,169       11.69       98.08
          6 |         48        0.48       98.56
          7 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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