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

    Vehicle |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,752       67.52       67.52
          2 |      2,678       26.78       94.30
          3 |        415        4.15       98.45
          4 |        102        1.02       99.47
          5 |         30        0.30       99.77
          6 |          6        0.06       99.83
          7 |          2        0.02       99.85
          8 |          1        0.01       99.86
          9 |          1        0.01       99.87
         10 |          1        0.01       99.88
         11 |          1        0.01       99.89
         12 |          1        0.01       99.90
         13 |          1        0.01       99.91
         14 |          1        0.01       99.92
         15 |          1        0.01       99.93
         16 |          1        0.01       99.94
         17 |          1        0.01       99.95
         18 |          1        0.01       99.96
         19 |          1        0.01       99.97
         20 |          1        0.01       99.98
         21 |          1        0.01       99.99
         22 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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