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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        834        8.34        8.34
          1 |      6,222       62.22       70.56
          2 |      2,497       24.97       95.53
          3 |        351        3.51       99.04
          4 |         74        0.74       99.78
          5 |         15        0.15       99.93
          6 |          4        0.04       99.97
          7 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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