Frequencies for first 10,000 rows of prov2270 variable in pos1997 dataset :

       srv: |
occupationa |
  l therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,924       69.24       69.24
          0 |        732        7.32       76.56
          1 |        904        9.04       85.60
          2 |      1,189       11.89       97.49
          3 |        251        2.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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