Frequencies for impact1 variable in vehnit dataset :

    INITIAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        0.81        0.81
          1 |         22        1.49        2.30
          2 |         20        1.35        3.65
          3 |         54        3.65        7.29
          4 |         24        1.62        8.91
          5 |         64        4.32       13.23
          6 |        619       41.80       55.03
          7 |        111        7.49       62.53
          8 |         42        2.84       65.36
          9 |        127        8.58       73.94
         10 |         38        2.57       76.50
         11 |         80        5.40       81.90
         12 |        194       13.10       95.00
         13 |         12        0.81       95.81
         14 |          3        0.20       96.02
         18 |          5        0.34       96.35
         99 |         54        3.65      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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