Frequencies for first 10,000 rows of a_imp1 variable in veh_aux dataset :

     Intial |
     Impact |
      Point |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        662        6.62        6.62
          2 |      6,193       61.93       68.55
          3 |        890        8.90       77.45
          4 |        549        5.49       82.94
          5 |      1,081       10.81       93.75
          6 |        494        4.94       98.69
          7 |        131        1.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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