Frequencies for ocupants variable in vehicle dataset :

  occupants |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.14        0.14
          1 |        523       73.04       73.18
          2 |        113       15.78       88.97
          3 |         42        5.87       94.83
          4 |         25        3.49       98.32
          5 |         10        1.40       99.72
          6 |          2        0.28      100.00
------------+-----------------------------------
      Total |        716      100.00

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