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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        598        5.98        5.98
          1 |        346        3.46        9.44
          2 |        258        2.58       12.02
          3 |        559        5.59       17.61
          4 |         95        0.95       18.56
          5 |         91        0.91       19.47
          6 |        455        4.55       24.02
          7 |        149        1.49       25.51
          8 |        112        1.12       26.63
          9 |        722        7.22       33.85
         10 |        194        1.94       35.79
         11 |        479        4.79       40.58
         12 |      5,050       50.50       91.08
         13 |        165        1.65       92.73
         14 |        336        3.36       96.09
         99 |        391        3.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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