Frequencies for first 10,000 rows of vctnl_gdnc_srvc_cd variable in pos2000 dataset :

       srv: |
 vocational |
   guidance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,590       85.90       85.90
          0 |      1,370       13.70       99.60
          1 |          6        0.06       99.66
          2 |         32        0.32       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017