Frequencies for first 10,000 rows of impact2 variable in vehicle dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        672        6.72        6.72
          1 |        628        6.28       13.00
          2 |        202        2.02       15.02
          3 |        693        6.93       21.95
          4 |        120        1.20       23.15
          5 |        135        1.35       24.50
          6 |        370        3.70       28.20
          7 |        157        1.57       29.77
          8 |        168        1.68       31.45
          9 |        750        7.50       38.95
         10 |        244        2.44       41.39
         11 |        700        7.00       48.39
         12 |      4,349       43.49       91.88
         13 |         99        0.99       92.87
         14 |        477        4.77       97.64
         15 |         33        0.33       97.97
         16 |         19        0.19       98.16
         99 |        184        1.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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