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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        341        3.41        3.41
          * |      5,881       58.81       62.22
          9 |      1,830       18.30       80.52
          D |        147        1.47       81.99
          G |      1,801       18.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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