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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        240        2.40        2.40
          1 |        844        8.44       10.84
          2 |        188        1.88       12.72
          3 |        905        9.05       21.77
          4 |         57        0.57       22.34
          5 |        104        1.04       23.38
          6 |        357        3.57       26.95
          7 |        156        1.56       28.51
          8 |         78        0.78       29.29
          9 |        861        8.61       37.90
         10 |         92        0.92       38.82
         11 |        915        9.15       47.97
         12 |      4,711       47.11       95.08
         13 |         73        0.73       95.81
         14 |        275        2.75       98.56
         99 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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