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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,756       67.56       67.56
          2 |      2,688       26.88       94.44
          3 |        432        4.32       98.76
          4 |         84        0.84       99.60
          5 |         25        0.25       99.85
          6 |         10        0.10       99.95
          7 |          4        0.04       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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