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

  Condition |
(Impairment |
  ) at Time |
   of Crash |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,185       61.85       61.85
          1 |         58        0.58       62.43
          2 |        154        1.54       63.97
          3 |          2        0.02       63.99
          5 |          1        0.01       64.00
          6 |          1        0.01       64.01
          8 |         14        0.14       64.15
          9 |      1,337       13.37       77.52
         10 |         24        0.24       77.76
         95 |        365        3.65       81.41
         96 |         21        0.21       81.62
         98 |        239        2.39       84.01
         99 |      1,599       15.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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