Frequencies for lgt_cond variable in accident dataset :

      Light |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        184       37.86       37.86
          2 |        187       38.48       76.34
          3 |         74       15.23       91.56
          4 |          8        1.65       93.21
          5 |         31        6.38       99.59
          9 |          2        0.41      100.00
------------+-----------------------------------
      Total |        486      100.00

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