Frequencies for first 10,000 rows of fldcd_tr variable in vehicle dataset :

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        157        1.57        1.57
          * |      6,291       62.91       64.48
          9 |        502        5.02       69.50
          D |        667        6.67       76.17
          G |      2,383       23.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016