Frequencies for man_coll variable in accident dataset :

  Manner of |
  Collision |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        407       71.28       71.28
          1 |         35        6.13       77.41
          2 |        101       17.69       95.10
          4 |         28        4.90      100.00
------------+-----------------------------------
      Total |        571      100.00

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