Frequencies for impact2 variable in vehicle dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         30        4.19        4.19
          1 |         39        5.45        9.64
          2 |          6        0.84       10.47
          3 |         51        7.12       17.60
          5 |          2        0.28       17.88
          6 |         26        3.63       21.51
          7 |          8        1.12       22.63
          9 |         57        7.96       30.59
         10 |         21        2.93       33.52
         11 |         30        4.19       37.71
         12 |        413       57.68       95.39
         13 |         33        4.61      100.00
------------+-----------------------------------
      Total |        716      100.00

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