Frequencies for first 10,000 rows of man_coll variable in vehicle dataset :

  Manner of |
  Collision |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,355       43.55       43.55
          1 |        826        8.26       51.81
          2 |      1,544       15.44       67.25
          4 |      2,917       29.17       96.42
          5 |        168        1.68       98.10
          6 |        174        1.74       99.84
          9 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016