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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        684        6.84        6.84
          1 |        354        3.54       10.38
          2 |        254        2.54       12.92
          3 |        591        5.91       18.83
          4 |        110        1.10       19.93
          5 |        128        1.28       21.21
          6 |        402        4.02       25.23
          7 |        161        1.61       26.84
          8 |        105        1.05       27.89
          9 |        788        7.88       35.77
         10 |        178        1.78       37.55
         11 |        455        4.55       42.10
         12 |      4,941       49.41       91.51
         13 |        179        1.79       93.30
         14 |        356        3.56       96.86
         99 |        314        3.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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