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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        662        6.62        6.62
          1 |        621        6.21       12.83
          2 |        204        2.04       14.87
          3 |        671        6.71       21.58
          4 |        125        1.25       22.83
          5 |        123        1.23       24.06
          6 |        309        3.09       27.15
          7 |        136        1.36       28.51
          8 |        158        1.58       30.09
          9 |        800        8.00       38.09
         10 |        233        2.33       40.42
         11 |        752        7.52       47.94
         12 |      4,486       44.86       92.80
         13 |        105        1.05       93.85
         14 |        432        4.32       98.17
         15 |         37        0.37       98.54
         16 |         13        0.13       98.67
         99 |        133        1.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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