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

pre- impact |
   location |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         51        0.51        0.51
          1 |      5,737       57.37       57.88
          2 |      1,157       11.57       69.45
          3 |        181        1.81       71.26
          4 |      2,446       24.46       95.72
          5 |         42        0.42       96.14
          6 |         86        0.86       97.00
          7 |         44        0.44       97.44
          9 |        256        2.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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