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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        780        7.80        7.80
          2 |        700        7.00       14.80
          3 |        922        9.22       24.02
          4 |        896        8.96       32.98
          5 |        910        9.10       42.08
          6 |        968        9.68       51.76
          7 |        994        9.94       61.70
          8 |        976        9.76       71.46
          9 |        867        8.67       80.13
         10 |        703        7.03       87.16
         11 |        674        6.74       93.90
         12 |        610        6.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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