Frequencies for lgt_cond variable in accident dataset :

      LIGHT |
  CONDITION |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        181       34.09       34.09
          2 |        162       30.51       64.60
          3 |        152       28.63       93.22
          4 |         27        5.08       98.31
          5 |          9        1.69      100.00
------------+-----------------------------------
      Total |        531      100.00

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