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

  number of |
  cylinders |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,320       13.20       13.20
          1 |         66        0.66       13.86
         10 |         54        0.54       14.40
          2 |        399        3.99       18.39
          3 |         10        0.10       18.49
          4 |      2,779       27.79       46.28
          5 |         30        0.30       46.58
          6 |      3,283       32.83       79.41
          8 |      2,052       20.52       99.93
          R |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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