Frequencies for pcylinder variable in parkwork dataset :

  Number of |
  Cylinders |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         74        7.39        7.39
         10 |          3        0.30        7.68
         12 |          1        0.10        7.78
          2 |          5        0.50        8.28
          4 |        231       23.05       31.34
          5 |          6        0.60       31.94
          6 |        432       43.11       75.05
          8 |        249       24.85       99.90
          R |          1        0.10      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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