Frequencies for first 10,000 rows of vctnl_gdnc_srvc_cd variable in pos2007 dataset :

       srv: |
 vocational |
   guidance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,195       81.95       81.95
          0 |      1,758       17.58       99.53
          1 |         10        0.10       99.63
          2 |         33        0.33       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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