Frequencies for veh_no variable in vehnit dataset :

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         51        4.57        4.57
          2 |        602       53.94       58.51
          3 |        269       24.10       82.62
          4 |         99        8.87       91.49
          5 |         50        4.48       95.97
          6 |         25        2.24       98.21
          7 |         12        1.08       99.28
          8 |          5        0.45       99.73
          9 |          1        0.09       99.82
         10 |          1        0.09       99.91
         15 |          1        0.09      100.00
------------+-----------------------------------
      Total |      1,116      100.00

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