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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        628        6.28        6.28
          1 |      6,179       61.79       68.07
          2 |      2,598       25.98       94.05
          3 |        431        4.31       98.36
          4 |        104        1.04       99.40
          5 |         29        0.29       99.69
          6 |         12        0.12       99.81
          7 |         12        0.12       99.93
          8 |          4        0.04       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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