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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        652        6.52        6.52
          1 |        989        9.89       16.41
          2 |        167        1.67       18.08
          3 |        525        5.25       23.33
          4 |         86        0.86       24.19
          5 |        139        1.39       25.58
          6 |        312        3.12       28.70
          7 |        163        1.63       30.33
          8 |        141        1.41       31.74
          9 |        600        6.00       37.74
         10 |        190        1.90       39.64
         11 |      1,115       11.15       50.79
         12 |      4,397       43.97       94.76
         13 |         30        0.30       95.06
         14 |        386        3.86       98.92
         15 |          1        0.01       98.93
         16 |          1        0.01       98.94
         99 |        106        1.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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