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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        129        1.29        1.29
          * |      6,247       62.47       63.76
          9 |        470        4.70       68.46
          D |        700        7.00       75.46
          G |      2,452       24.52       99.98
          P |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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