Frequencies for first 10,000 rows of prov2535 variable in pos1991 dataset :

       srv: |
 vocational |
   guidance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,817       58.17       58.17
          0 |      3,670       36.70       94.87
          1 |        112        1.12       95.99
          2 |        264        2.64       98.63
          3 |        101        1.01       99.64
          7 |         36        0.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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