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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          8        0.08        0.08
          * |      5,090       50.90       50.98
          9 |        708        7.08       58.06
          D |        815        8.15       66.21
          E |          1        0.01       66.22
          F |          1        0.01       66.23
          G |      3,363       33.63       99.86
          N |          1        0.01       99.87
          P |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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