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

Pre- Impact |
   Location |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         81        0.81        0.81
          1 |      5,462       54.62       55.43
          2 |      1,215       12.15       67.58
          3 |         95        0.95       68.53
          4 |      2,754       27.54       96.07
          5 |         53        0.53       96.60
          6 |        146        1.46       98.06
          7 |         26        0.26       98.32
          9 |        168        1.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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