Frequencies for man_coll variable in accident dataset :

  Manner of |
  Collision |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        369       75.93       75.93
          1 |          7        1.44       77.37
          2 |         51       10.49       87.86
          4 |         46        9.47       97.33
          5 |          8        1.65       98.97
          6 |          5        1.03      100.00
------------+-----------------------------------
      Total |        486      100.00

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