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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        100        1.00        1.00
          * |      6,217       62.17       63.17
          9 |        493        4.93       68.10
          D |        816        8.16       76.26
          G |      2,374       23.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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