Frequencies for fldcd_tr variable in vehnit dataset :

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
          * |        709       53.39       53.39
          9 |         86        6.48       59.86
          C |          1        0.08       59.94
          D |        222       16.72       76.66
          F |          6        0.45       77.11
          G |        304       22.89      100.00
------------+-----------------------------------
      Total |      1,328      100.00

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