Frequencies for man_coll variable in vehnit dataset :

  MANNER OF |
  COLLISION |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        428       38.35       38.35
          1 |        245       21.95       60.30
          2 |         63        5.65       65.95
          3 |         63        5.65       71.59
          4 |         37        3.32       74.91
          5 |        121       10.84       85.75
          6 |         20        1.79       87.54
          7 |         68        6.09       93.64
          8 |         30        2.69       96.33
          9 |         27        2.42       98.75
         10 |          1        0.09       98.84
         11 |          6        0.54       99.37
         99 |          7        0.63      100.00
------------+-----------------------------------
      Total |      1,116      100.00

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