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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        713        7.13        7.13
          2 |        720        7.20       14.33
          3 |        964        9.64       23.97
          4 |        908        9.08       33.05
          5 |        893        8.93       41.98
          6 |        927        9.27       51.25
          7 |        930        9.30       60.55
          8 |        946        9.46       70.01
          9 |        780        7.80       77.81
         10 |        747        7.47       85.28
         11 |        677        6.77       92.05
         12 |        795        7.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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