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

Atmospheric |
 Conditions |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,674       86.74       86.74
          2 |      1,030       10.30       97.04
          3 |          5        0.05       97.09
          4 |         56        0.56       97.65
          5 |        163        1.63       99.28
          6 |          5        0.05       99.33
          7 |          3        0.03       99.36
          8 |         20        0.20       99.56
          9 |         44        0.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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