Frequencies for first 10,000 rows of pcrash5 variable in vehicle dataset :

Pre- Impact |
   Location |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         85        0.85        0.85
          1 |      5,538       55.38       56.23
          2 |      1,147       11.47       67.70
          3 |        112        1.12       68.82
          4 |      2,721       27.21       96.03
          5 |         31        0.31       96.34
          6 |        143        1.43       97.77
          7 |         38        0.38       98.15
          9 |        185        1.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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