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

Atmospheric |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,671       86.71       86.71
          2 |        809        8.09       94.80
          3 |         17        0.17       94.97
          4 |         69        0.69       95.66
          7 |        201        2.01       97.67
          9 |        233        2.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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