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

 TRUCK FUEL |
       CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          5        0.05        0.05
          * |      6,551       65.51       65.56
          9 |        478        4.78       70.34
          D |        805        8.05       78.39
          F |         63        0.63       79.02
          G |      2,096       20.96       99.98
          N |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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