Frequencies for veh_no variable in vehnit dataset :

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         59        4.24        4.24
          2 |        748       53.70       57.93
          3 |        366       26.27       84.21
          4 |        124        8.90       93.11
          5 |         50        3.59       96.70
          6 |         17        1.22       97.92
          7 |         11        0.79       98.71
          8 |          6        0.43       99.14
          9 |          5        0.36       99.50
         10 |          4        0.29       99.78
         11 |          1        0.07       99.86
         12 |          1        0.07       99.93
         13 |          1        0.07      100.00
------------+-----------------------------------
      Total |      1,393      100.00

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