Frequencies for pfuecode variable in parkwork dataset :

  fuel code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         64        5.87        5.87
          B |          7        0.64        6.51
          C |          1        0.09        6.60
          D |        177       16.22       22.82
          F |         53        4.86       27.68
          G |        789       72.32      100.00
------------+-----------------------------------
      Total |      1,091      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016