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

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,592       75.92       75.92
          2 |      1,932       19.32       95.24
          3 |        288        2.88       98.12
          4 |         74        0.74       98.86
          5 |         45        0.45       99.31
          6 |         36        0.36       99.67
          7 |         12        0.12       99.79
          8 |         13        0.13       99.92
          9 |          4        0.04       99.96
         10 |          2        0.02       99.98
         11 |          1        0.01       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016