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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        764        7.64        7.64
          1 |        882        8.82       16.46
          2 |        150        1.50       17.96
          3 |        630        6.30       24.26
          4 |         59        0.59       24.85
          5 |         78        0.78       25.63
          6 |        332        3.32       28.95
          7 |        124        1.24       30.19
          8 |        106        1.06       31.25
          9 |        723        7.23       38.48
         10 |        151        1.51       39.99
         11 |        778        7.78       47.77
         12 |      4,846       48.46       96.23
         13 |         49        0.49       96.72
         14 |        297        2.97       99.69
         15 |          2        0.02       99.71
         99 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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