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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        615        6.15        6.15
          1 |        337        3.37        9.52
          2 |        233        2.33       11.85
          3 |        544        5.44       17.29
          4 |        144        1.44       18.73
          5 |        108        1.08       19.81
          6 |        471        4.71       24.52
          7 |        157        1.57       26.09
          8 |        106        1.06       27.15
          9 |        739        7.39       34.54
         10 |        186        1.86       36.40
         11 |        399        3.99       40.39
         12 |      5,143       51.43       91.82
         13 |        160        1.60       93.42
         14 |        260        2.60       96.02
         99 |        398        3.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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