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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        365        3.65        3.65
          * |      5,515       55.15       58.80
          9 |      2,319       23.19       81.99
          D |        177        1.77       83.76
          G |      1,624       16.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016