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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,610       66.10       66.10
          2 |      2,670       26.70       92.80
          3 |        524        5.24       98.04
          4 |        126        1.26       99.30
          5 |         35        0.35       99.65
          6 |         12        0.12       99.77
          7 |          7        0.07       99.84
          8 |          3        0.03       99.87
          9 |          3        0.03       99.90
         10 |          2        0.02       99.92
         11 |          2        0.02       99.94
         12 |          2        0.02       99.96
         13 |          1        0.01       99.97
         14 |          1        0.01       99.98
         15 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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