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

  manner of |
  collision |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,831       48.31       48.31
          1 |      1,128       11.28       59.59
          2 |      1,204       12.04       71.63
          6 |      2,326       23.26       94.89
          7 |        278        2.78       97.67
          8 |        149        1.49       99.16
          9 |         13        0.13       99.29
         11 |         25        0.25       99.54
         99 |         46        0.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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