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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        665        6.65        6.65
          1 |        525        5.25       11.90
          2 |        215        2.15       14.05
          3 |        580        5.80       19.85
          4 |        111        1.11       20.96
          5 |        113        1.13       22.09
          6 |        383        3.83       25.92
          7 |        134        1.34       27.26
          8 |        137        1.37       28.63
          9 |        741        7.41       36.04
         10 |        214        2.14       38.18
         11 |        631        6.31       44.49
         12 |      4,658       46.58       91.07
         13 |        163        1.63       92.70
         14 |        366        3.66       96.36
         99 |        364        3.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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