Frequencies for first 10,000 rows of vctnl_gdnc_srvc_cd variable in pos1994 dataset :

       srv: |
 vocational |
   guidance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,780       87.80       87.80
          0 |      1,197       11.97       99.77
          1 |          7        0.07       99.84
          2 |         15        0.15       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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