Frequencies for first 10,000 rows of weather2 variable in accident dataset :

atmospheric |
 conditions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,911       99.11       99.11
          1 |          2        0.02       99.13
          2 |         16        0.16       99.29
          3 |          2        0.02       99.31
          4 |          5        0.05       99.36
          5 |          4        0.04       99.40
          6 |          2        0.02       99.42
          7 |          1        0.01       99.43
          8 |          1        0.01       99.44
         10 |         53        0.53       99.97
         11 |          2        0.02       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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