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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         15        0.15        0.15
          * |      5,978       59.78       59.93
          9 |      1,899       18.99       78.92
          D |        230        2.30       81.22
          G |      1,878       18.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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