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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,619       66.19       66.19
          2 |      2,705       27.05       93.24
          3 |        458        4.58       97.82
          4 |        105        1.05       98.87
          5 |         36        0.36       99.23
          6 |         21        0.21       99.44
          7 |         15        0.15       99.59
          8 |          8        0.08       99.67
          9 |          4        0.04       99.71
         10 |          3        0.03       99.74
         11 |          2        0.02       99.76
         12 |          2        0.02       99.78
         13 |          2        0.02       99.80
         14 |          2        0.02       99.82
         15 |          2        0.02       99.84
         16 |          2        0.02       99.86
         17 |          1        0.01       99.87
         18 |          1        0.01       99.88
         19 |          1        0.01       99.89
         20 |          1        0.01       99.90
         21 |          1        0.01       99.91
         22 |          1        0.01       99.92
         23 |          1        0.01       99.93
         24 |          1        0.01       99.94
         25 |          1        0.01       99.95
         26 |          1        0.01       99.96
         27 |          1        0.01       99.97
         28 |          1        0.01       99.98
         29 |          1        0.01       99.99
         30 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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