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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,600       66.00       66.00
          2 |      2,762       27.62       93.62
          3 |        458        4.58       98.20
          4 |        102        1.02       99.22
          5 |         37        0.37       99.59
          6 |         18        0.18       99.77
          7 |          8        0.08       99.85
          8 |          6        0.06       99.91
          9 |          4        0.04       99.95
         10 |          2        0.02       99.97
         11 |          1        0.01       99.98
         12 |          1        0.01       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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