Frequencies for man_coll variable in person dataset :

  MANNER OF |
  COLLISION |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        624       57.94       57.94
          1 |         61        5.66       63.60
          2 |        127       11.79       75.39
          4 |         68        6.31       81.71
          5 |         88        8.17       89.88
          7 |         50        4.64       94.52
          8 |         59        5.48      100.00
------------+-----------------------------------
      Total |      1,077      100.00

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