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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          5        0.05        0.05
          * |      6,353       63.53       63.58
          9 |        789        7.89       71.47
          D |        570        5.70       77.17
          G |      2,283       22.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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