Frequencies for first 10,000 rows of prov2270 variable in pos2004 dataset :

       srv: |
occupationa |
  l therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,498       64.98       64.98
          0 |        731        7.31       72.29
          1 |      1,059       10.59       82.88
          2 |      1,296       12.96       95.84
          3 |        416        4.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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