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

atmospheric |
 conditions |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,882       78.82       78.82
          2 |        548        5.48       84.30
          3 |          7        0.07       84.37
          4 |         49        0.49       84.86
          5 |         93        0.93       85.79
          6 |         17        0.17       85.96
          7 |          1        0.01       85.97
          8 |          9        0.09       86.06
         10 |      1,294       12.94       99.00
         11 |          4        0.04       99.04
         98 |         17        0.17       99.21
         99 |         79        0.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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