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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          4        0.04        0.04
          * |      5,864       58.64       58.68
          9 |      1,275       12.75       71.43
          D |        813        8.13       79.56
          F |          4        0.04       79.60
          G |      2,040       20.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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