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

       Fuel |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         11        0.11        0.11
          * |      6,083       60.83       60.94
          9 |      1,196       11.96       72.90
          D |        490        4.90       77.80
          G |      2,218       22.18       99.98
          P |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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