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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        622        6.22        6.22
          1 |      6,193       61.93       68.15
          2 |      2,541       25.41       93.56
          3 |        466        4.66       98.22
          4 |        119        1.19       99.41
          5 |         34        0.34       99.75
          6 |         13        0.13       99.88
          7 |          8        0.08       99.96
          8 |          1        0.01       99.97
          9 |          1        0.01       99.98
         10 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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