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

  Fuel Code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,052       20.52       20.52
          B |         55        0.55       21.07
          C |          1        0.01       21.08
          D |        736        7.36       28.44
          F |        342        3.42       31.86
          G |      6,810       68.10       99.96
          N |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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