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

   weather2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,980       99.80       99.80
          1 |          7        0.07       99.87
          2 |          2        0.02       99.89
          4 |          4        0.04       99.93
          5 |          4        0.04       99.97
          6 |          2        0.02       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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