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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        692        6.92        6.92
          1 |        881        8.81       15.73
          2 |        234        2.34       18.07
          3 |        600        6.00       24.07
          4 |         90        0.90       24.97
          5 |        107        1.07       26.04
          6 |        359        3.59       29.63
          7 |        134        1.34       30.97
          8 |        142        1.42       32.39
          9 |        661        6.61       39.00
         10 |        242        2.42       41.42
         11 |        998        9.98       51.40
         12 |      4,202       42.02       93.42
         13 |         32        0.32       93.74
         14 |        476        4.76       98.50
         15 |          5        0.05       98.55
         16 |          1        0.01       98.56
         99 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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