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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,589       65.89       65.89
          2 |      2,710       27.10       92.99
          3 |        498        4.98       97.97
          4 |        125        1.25       99.22
          5 |         46        0.46       99.68
          6 |         16        0.16       99.84
          7 |          8        0.08       99.92
          8 |          5        0.05       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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