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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          7        0.07        0.07
          * |      6,259       62.59       62.66
          9 |        789        7.89       70.55
          D |        614        6.14       76.69
          G |      2,329       23.29       99.98
          P |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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