Frequencies for weather variable in accident dataset :

Atmospheric |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        473       96.73       96.73
          2 |         16        3.27      100.00
------------+-----------------------------------
      Total |        489      100.00

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