Frequencies for first 10,000 rows of vnumber1 variable in cevent dataset :

    Vehicle |
   Number 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,530       85.30       85.30
          2 |      1,268       12.68       97.98
          3 |        150        1.50       99.48
          4 |         31        0.31       99.79
          5 |         12        0.12       99.91
          6 |          1        0.01       99.92
          7 |          1        0.01       99.93
          8 |          1        0.01       99.94
          9 |          1        0.01       99.95
         10 |          1        0.01       99.96
         11 |          1        0.01       99.97
         12 |          2        0.02       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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