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

  condition |
(impairment |
  ) at time |
   of crash |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,773       57.73       57.73
          1 |         74        0.74       58.47
          2 |        152        1.52       59.99
          3 |          1        0.01       60.00
          4 |          1        0.01       60.01
          5 |          1        0.01       60.02
          8 |         19        0.19       60.21
          9 |      1,283       12.83       73.04
         10 |         15        0.15       73.19
         95 |         63        0.63       73.82
         96 |         11        0.11       73.93
         98 |        288        2.88       76.81
         99 |      2,319       23.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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