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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        693        6.93        6.93
          1 |      6,397       63.97       70.90
          2 |      2,418       24.18       95.08
          3 |        358        3.58       98.66
          4 |         88        0.88       99.54
          5 |         29        0.29       99.83
          6 |          9        0.09       99.92
          7 |          5        0.05       99.97
          8 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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