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 |          7        0.07       99.18
          2 |         22        0.22       99.40
          3 |          3        0.03       99.43
          5 |          9        0.09       99.52
          7 |          1        0.01       99.53
         10 |         43        0.43       99.96
         11 |          2        0.02       99.98
         12 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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