Frequencies for first 10,000 rows of impact1 variable in vehicle dataset :

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        256        2.56        2.56
          1 |        717        7.17        9.73
          2 |        214        2.14       11.87
          3 |        945        9.45       21.32
          4 |         49        0.49       21.81
          5 |        132        1.32       23.13
          6 |        369        3.69       26.82
          7 |        177        1.77       28.59
          8 |         82        0.82       29.41
          9 |        732        7.32       36.73
         10 |        132        1.32       38.05
         11 |        837        8.37       46.42
         12 |      4,604       46.04       92.46
         13 |         56        0.56       93.02
         14 |        515        5.15       98.17
         99 |        183        1.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016