Frequencies for first 10,000 rows of prov2535 variable in pos2004 dataset :

       srv: |
 vocational |
   guidance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,384       83.84       83.84
          0 |      1,576       15.76       99.60
          1 |          6        0.06       99.66
          2 |         31        0.31       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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