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

Atmospheric |
 Conditions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,857       98.57       98.57
          1 |          6        0.06       98.63
          2 |         18        0.18       98.81
          3 |          2        0.02       98.83
          4 |          7        0.07       98.90
          5 |          8        0.08       98.98
          6 |          1        0.01       98.99
          7 |          2        0.02       99.01
         10 |         97        0.97       99.98
         11 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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