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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        785        7.85        7.85
          1 |        827        8.27       16.12
          2 |        169        1.69       17.81
          3 |        620        6.20       24.01
          4 |         78        0.78       24.79
          5 |        100        1.00       25.79
          6 |        389        3.89       29.68
          7 |        130        1.30       30.98
          8 |         96        0.96       31.94
          9 |        652        6.52       38.46
         10 |        197        1.97       40.43
         11 |      1,039       10.39       50.82
         12 |      4,431       44.31       95.13
         13 |         24        0.24       95.37
         14 |        347        3.47       98.84
         15 |          6        0.06       98.90
         16 |          2        0.02       98.92
         99 |        108        1.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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