Frequencies for impact1 variable in vehnit dataset :

    INITIAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.07        0.07
          1 |         32        2.30        2.37
          2 |         32        2.30        4.67
          3 |         48        3.45        8.11
          4 |         21        1.51        9.62
          5 |         37        2.66       12.28
          6 |        545       39.12       51.40
          7 |        102        7.32       58.72
          8 |         37        2.66       61.38
          9 |         96        6.89       68.27
         10 |         40        2.87       71.14
         11 |         89        6.39       77.53
         12 |        211       15.15       92.68
         13 |         39        2.80       95.48
         14 |          8        0.57       96.05
         18 |         10        0.72       96.77
         99 |         45        3.23      100.00
------------+-----------------------------------
      Total |      1,393      100.00

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