Frequencies for first 10,000 rows of prov2535 variable in pos2002 dataset :

       srv: |
 vocational |
   guidance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,505       85.05       85.05
          0 |      1,452       14.52       99.57
          1 |          4        0.04       99.61
          2 |         36        0.36       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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