Frequencies for pman_coll variable in parkwork dataset :

  manner of |
  collision |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        908       83.23       83.23
          1 |         37        3.39       86.62
          2 |         19        1.74       88.36
          6 |        107        9.81       98.17
          7 |         12        1.10       99.27
          8 |          2        0.18       99.45
          9 |          1        0.09       99.54
         11 |          1        0.09       99.63
         99 |          4        0.37      100.00
------------+-----------------------------------
      Total |      1,091      100.00

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