Frequencies for first 10,000 rows of fuelcode variable in person dataset :

  fuel code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,038       20.38       20.38
          B |         47        0.47       20.85
          C |          1        0.01       20.86
          D |        711        7.11       27.97
          F |        347        3.47       31.44
          G |      6,852       68.52       99.96
          N |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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