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

  number of |
  cylinders |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        526        5.26        5.26
          1 |         79        0.79        6.05
         10 |         40        0.40        6.45
         12 |          1        0.01        6.46
          2 |        600        6.00       12.46
          3 |         17        0.17       12.63
          4 |      3,207       32.07       44.70
          5 |         62        0.62       45.32
          6 |      3,539       35.39       80.71
          8 |      1,923       19.23       99.94
          R |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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