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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         17        0.17        0.17
          * |      5,996       59.96       60.13
          9 |      1,236       12.36       72.49
          D |        473        4.73       77.22
          G |      2,278       22.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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