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

   weather2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,985       99.85       99.85
          1 |          8        0.08       99.93
          2 |          1        0.01       99.94
          3 |          2        0.02       99.96
          4 |          1        0.01       99.97
          5 |          1        0.01       99.98
          7 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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