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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         11        0.11        0.11
          * |      6,240       62.40       62.51
          9 |      1,560       15.60       78.11
          D |        371        3.71       81.82
          G |      1,817       18.17       99.99
          P |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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