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

  Number of |
  Cylinders |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,391       13.91       13.91
          1 |         48        0.48       14.39
         10 |         75        0.75       15.14
          2 |        360        3.60       18.74
          3 |          8        0.08       18.82
          4 |      2,509       25.09       43.91
          5 |         45        0.45       44.36
          6 |      3,452       34.52       78.88
          8 |      2,110       21.10       99.98
          R |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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