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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        621        6.21        6.21
          1 |        313        3.13        9.34
          2 |        109        1.09       10.43
          3 |        555        5.55       15.98
          4 |         75        0.75       16.73
          5 |        109        1.09       17.82
          6 |        439        4.39       22.21
          7 |        115        1.15       23.36
          8 |         85        0.85       24.21
          9 |        842        8.42       32.63
         10 |        208        2.08       34.71
         11 |        358        3.58       38.29
         12 |      5,233       52.33       90.62
         13 |        154        1.54       92.16
         14 |        336        3.36       95.52
         18 |         28        0.28       95.80
         99 |        420        4.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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