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

  Fuel Code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,028       20.28       20.28
          B |         44        0.44       20.72
          C |          8        0.08       20.80
          D |        667        6.67       27.47
          F |        270        2.70       30.17
          G |      6,982       69.82       99.99
          N |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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