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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        743        7.43        7.43
          1 |      6,061       60.61       68.04
          2 |      2,659       26.59       94.63
          3 |        423        4.23       98.86
          4 |         89        0.89       99.75
          5 |         22        0.22       99.97
          6 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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