Frequencies for man_coll variable in vehnit dataset :

  MANNER OF |
  COLLISION |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        489       33.02       33.02
          1 |        399       26.94       59.96
          2 |         89        6.01       65.97
          3 |         59        3.98       69.95
          4 |         58        3.92       73.87
          5 |        167       11.28       85.15
          6 |         18        1.22       86.36
          7 |        110        7.43       93.79
          8 |         18        1.22       95.00
          9 |         48        3.24       98.24
         10 |          2        0.14       98.38
         11 |         13        0.88       99.26
         99 |         11        0.74      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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