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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          8        0.08        0.08
          * |      6,360       63.60       63.68
          9 |        568        5.68       69.36
          C |          1        0.01       69.37
          D |        897        8.97       78.34
          F |         55        0.55       78.89
          G |      2,108       21.08       99.97
          N |          1        0.01       99.98
          P |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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