Frequencies for first 10,000 rows of impact1 variable in vehicle dataset :

    INITIAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        654        6.54        6.54
          1 |        436        4.36       10.90
          2 |        268        2.68       13.58
          3 |        454        4.54       18.12
          4 |         82        0.82       18.94
          5 |        111        1.11       20.05
          6 |        367        3.67       23.72
          7 |        141        1.41       25.13
          8 |         90        0.90       26.03
          9 |        616        6.16       32.19
         10 |        197        1.97       34.16
         11 |        664        6.64       40.80
         12 |      5,180       51.80       92.60
         13 |         30        0.30       92.90
         14 |        451        4.51       97.41
         99 |        259        2.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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