Frequencies for first 10,000 rows of weather1 variable in accident dataset :

atmospheric |
 conditions |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,877       78.77       78.77
          2 |        570        5.70       84.47
          3 |          9        0.09       84.56
          4 |         50        0.50       85.06
          5 |         93        0.93       85.99
          6 |         14        0.14       86.13
          7 |          2        0.02       86.15
          8 |         11        0.11       86.26
         10 |      1,265       12.65       98.91
         11 |          4        0.04       98.95
         12 |          3        0.03       98.98
         98 |         29        0.29       99.27
         99 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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