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

atmospheric |
 conditions |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,854       78.54       78.54
          2 |        582        5.82       84.36
          3 |         11        0.11       84.47
          4 |         75        0.75       85.22
          5 |         70        0.70       85.92
          6 |          8        0.08       86.00
          7 |          3        0.03       86.03
          8 |         14        0.14       86.17
         10 |      1,248       12.48       98.65
         11 |          3        0.03       98.68
         12 |          3        0.03       98.71
         98 |         25        0.25       98.96
         99 |        104        1.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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