Frequencies for first 10,000 rows of prov2270 variable in pos1998 dataset :

       srv: |
occupationa |
  l therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,896       68.96       68.96
          0 |        718        7.18       76.14
          1 |        880        8.80       84.94
          2 |      1,232       12.32       97.26
          3 |        274        2.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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