Frequencies for first 10,000 rows of vnumber2 variable in vevent dataset :

    vehicle |
     number |
     (other |
   vehicle) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        746        7.46        7.46
          2 |      1,583       15.83       23.29
          3 |        316        3.16       26.45
          4 |         70        0.70       27.15
          5 |         24        0.24       27.39
          6 |         10        0.10       27.49
          7 |          4        0.04       27.53
          8 |          2        0.02       27.55
       5555 |      3,191       31.91       59.46
       9999 |      4,054       40.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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