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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        709        7.09        7.09
          2 |        699        6.99       14.08
          3 |        755        7.55       21.63
          4 |        803        8.03       29.66
          5 |        907        9.07       38.73
          6 |        850        8.50       47.23
          7 |        942        9.42       56.65
          8 |        902        9.02       65.67
          9 |        831        8.31       73.98
         10 |        950        9.50       83.48
         11 |        784        7.84       91.32
         12 |        868        8.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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