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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         10        0.10        0.10
          * |      6,218       62.18       62.28
          9 |        579        5.79       68.07
          D |        876        8.76       76.83
          F |         44        0.44       77.27
          G |      2,264       22.64       99.91
          P |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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