Frequencies for fldcd_tr variable in vehnit dataset :

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.07        0.07
          * |        766       51.72       51.79
          9 |        109        7.36       59.15
          D |        258       17.42       76.57
          E |          1        0.07       76.64
          F |          6        0.41       77.04
          G |        333       22.48       99.53
          P |          7        0.47      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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