Frequencies for veh_no variable in vehnit dataset :

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         84        5.67        5.67
          2 |        794       53.61       59.28
          3 |        356       24.04       83.32
          4 |        138        9.32       92.64
          5 |         52        3.51       96.15
          6 |         25        1.69       97.84
          7 |         14        0.95       98.78
          8 |         11        0.74       99.53
          9 |          2        0.14       99.66
         10 |          2        0.14       99.80
         11 |          1        0.07       99.86
         12 |          1        0.07       99.93
         13 |          1        0.07      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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