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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,550       65.50       65.50
          2 |      2,724       27.24       92.74
          3 |        500        5.00       97.74
          4 |        136        1.36       99.10
          5 |         44        0.44       99.54
          6 |         21        0.21       99.75
          7 |         11        0.11       99.86
          8 |          6        0.06       99.92
          9 |          2        0.02       99.94
         10 |          2        0.02       99.96
         11 |          1        0.01       99.97
         12 |          1        0.01       99.98
         13 |          1        0.01       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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