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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         22        0.22        0.22
          * |      4,976       49.76       49.98
          6 |          1        0.01       49.99
          9 |      3,223       32.23       82.22
          D |        133        1.33       83.55
          G |      1,645       16.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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