Frequencies for first 10,000 rows of prov2270 variable in pos1999 dataset :

       srv: |
occupationa |
  l therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,954       69.54       69.54
          0 |        674        6.74       76.28
          1 |        867        8.67       84.95
          2 |      1,216       12.16       97.11
          3 |        289        2.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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