Frequencies for pman_coll variable in parkwork dataset :

  manner of |
  collision |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        899       79.35       79.35
          1 |         42        3.71       83.05
          2 |         32        2.82       85.88
          6 |        134       11.83       97.71
          7 |         18        1.59       99.29
          8 |          4        0.35       99.65
         11 |          1        0.09       99.74
         98 |          1        0.09       99.82
         99 |          2        0.18      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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