Frequencies for nmimpair variable in nmimpair dataset :

  condition |
(impairment |
  ) at time |
   of crash |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,543       41.42       41.42
          1 |         15        0.24       41.66
          2 |          7        0.11       41.78
          3 |         20        0.33       42.10
          4 |         11        0.18       42.28
          5 |          8        0.13       42.41
          6 |          7        0.11       42.52
          7 |          6        0.10       42.62
          8 |         44        0.72       43.34
          9 |        747       12.17       55.50
         10 |         23        0.37       55.88
         96 |         55        0.90       56.78
         98 |      1,269       20.67       77.44
         99 |      1,383       22.52       99.97
          . |          2        0.03      100.00
------------+-----------------------------------
      Total |      6,140      100.00

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