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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        743        7.43        7.43
          1 |      6,147       61.47       68.90
          2 |      2,602       26.02       94.92
          3 |        384        3.84       98.76
          4 |         81        0.81       99.57
          5 |         22        0.22       99.79
          6 |          6        0.06       99.85
          7 |          8        0.08       99.93
          8 |          3        0.03       99.96
          9 |          3        0.03       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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