Frequencies for impact2 variable in vehnit dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        0.81        0.81
          1 |         25        1.69        2.50
          2 |         20        1.35        3.85
          3 |         49        3.31        7.16
          4 |         22        1.49        8.64
          5 |         61        4.12       12.76
          6 |        568       38.35       51.11
          7 |        108        7.29       58.41
          8 |         47        3.17       61.58
          9 |        128        8.64       70.22
         10 |         43        2.90       73.13
         11 |         74        5.00       78.12
         12 |        221       14.92       93.05
         13 |         20        1.35       94.40
         14 |          7        0.47       94.87
         18 |         18        1.22       96.08
         99 |         58        3.92      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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