Frequencies for first 10,000 rows of prov2535 variable in pos1998 dataset :

       srv: |
 vocational |
   guidance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,591       85.91       85.91
          0 |      1,377       13.77       99.68
          1 |          7        0.07       99.75
          2 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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