Frequencies for pfuecode variable in parkwork dataset :

  Fuel Code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         82        8.18        8.18
          B |          4        0.40        8.58
          C |          2        0.20        8.78
          D |        166       16.57       25.35
          F |         32        3.19       28.54
          G |        716       71.46      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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