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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        844        8.44        8.44
          1 |        787        7.87       16.31
          2 |        243        2.43       18.74
          3 |        606        6.06       24.80
          4 |         41        0.41       25.21
          5 |        102        1.02       26.23
          6 |        340        3.40       29.63
          7 |        146        1.46       31.09
          8 |         70        0.70       31.79
          9 |        636        6.36       38.15
         10 |        180        1.80       39.95
         11 |        832        8.32       48.27
         12 |      4,423       44.23       92.50
         13 |         33        0.33       92.83
         14 |        585        5.85       98.68
         99 |        132        1.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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