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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        834        8.34        8.34
          2 |        807        8.07       16.41
          3 |        846        8.46       24.87
          4 |        860        8.60       33.47
          5 |        917        9.17       42.64
          6 |        970        9.70       52.34
          7 |      1,047       10.47       62.81
          8 |      1,002       10.02       72.83
          9 |        710        7.10       79.93
         10 |        711        7.11       87.04
         11 |        667        6.67       93.71
         12 |        629        6.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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