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

  Manner of |
  Collision |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,767       47.67       47.67
          1 |      1,000       10.00       57.67
          2 |      1,171       11.71       69.38
          6 |      2,540       25.40       94.78
          7 |        303        3.03       97.81
          8 |        158        1.58       99.39
          9 |         16        0.16       99.55
         11 |         20        0.20       99.75
         98 |          4        0.04       99.79
         99 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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