Frequencies for man_coll variable in vehnit dataset :

  MANNER OF |
  COLLISION |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        473       35.62       35.62
          1 |        329       24.77       60.39
          2 |         90        6.78       67.17
          3 |         59        4.44       71.61
          4 |         72        5.42       77.03
          5 |        158       11.90       88.93
          6 |         12        0.90       89.83
          7 |         64        4.82       94.65
          8 |         28        2.11       96.76
          9 |         32        2.41       99.17
         10 |          3        0.23       99.40
         11 |          4        0.30       99.70
         99 |          4        0.30      100.00
------------+-----------------------------------
      Total |      1,328      100.00

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