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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          5        0.05        0.05
          * |      6,288       62.88       62.93
          9 |        880        8.80       71.73
          D |        567        5.67       77.40
          G |      2,259       22.59       99.99
          P |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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