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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        681        6.81        6.81
          2 |        746        7.46       14.27
          3 |        836        8.36       22.63
          4 |        830        8.30       30.93
          5 |        784        7.84       38.77
          6 |        772        7.72       46.49
          7 |        855        8.55       55.04
          8 |        901        9.01       64.05
          9 |        920        9.20       73.25
         10 |        924        9.24       82.49
         11 |        839        8.39       90.88
         12 |        912        9.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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