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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,727       67.27       67.27
          2 |      2,586       25.86       93.13
          3 |        447        4.47       97.60
          4 |        138        1.38       98.98
          5 |         42        0.42       99.40
          6 |         21        0.21       99.61
          7 |         12        0.12       99.73
          8 |          7        0.07       99.80
          9 |          6        0.06       99.86
         10 |          5        0.05       99.91
         11 |          4        0.04       99.95
         12 |          2        0.02       99.97
         13 |          2        0.02       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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