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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        688        6.88        6.88
          1 |        266        2.66        9.54
          2 |        241        2.41       11.95
          3 |        593        5.93       17.88
          4 |         98        0.98       18.86
          5 |        119        1.19       20.05
          6 |        439        4.39       24.44
          7 |        148        1.48       25.92
          8 |         91        0.91       26.83
          9 |        727        7.27       34.10
         10 |        170        1.70       35.80
         11 |        422        4.22       40.02
         12 |      5,188       51.88       91.90
         13 |        160        1.60       93.50
         14 |        331        3.31       96.81
         99 |        319        3.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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