Frequencies for impact2 variable in vehnit dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         22        1.66        1.66
          2 |         17        1.28        2.94
          3 |         68        5.12        8.06
          4 |         18        1.36        9.41
          5 |         46        3.46       12.88
          6 |        490       36.90       49.77
          7 |         86        6.48       56.25
          8 |         36        2.71       58.96
          9 |        126        9.49       68.45
         10 |         52        3.92       72.36
         11 |         57        4.29       76.66
         12 |        213       16.04       92.70
         13 |         29        2.18       94.88
         14 |          6        0.45       95.33
         18 |         10        0.75       96.08
         99 |         52        3.92      100.00
------------+-----------------------------------
      Total |      1,328      100.00

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