Frequencies for first 10,000 rows of impact2 variable in vehicle dataset :

     Impact |
Point-Princ |
       ipal |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        706        7.06        7.06
          1 |        692        6.92       13.98
          2 |        175        1.75       15.73
          3 |        672        6.72       22.45
          4 |        120        1.20       23.65
          5 |        123        1.23       24.88
          6 |        326        3.26       28.14
          7 |        144        1.44       29.58
          8 |        159        1.59       31.17
          9 |        767        7.67       38.84
         10 |        178        1.78       40.62
         11 |        790        7.90       48.52
         12 |      4,362       43.62       92.14
         13 |        119        1.19       93.33
         14 |        455        4.55       97.88
         15 |         54        0.54       98.42
         16 |         17        0.17       98.59
         99 |        141        1.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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