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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,597       65.97       65.97
          2 |      2,708       27.08       93.05
          3 |        487        4.87       97.92
          4 |        127        1.27       99.19
          5 |         41        0.41       99.60
          6 |         20        0.20       99.80
          7 |         12        0.12       99.92
          8 |          4        0.04       99.96
          9 |          2        0.02       99.98
         10 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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