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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        700        7.00        7.00
          2 |        739        7.39       14.39
          3 |        816        8.16       22.55
          4 |        800        8.00       30.55
          5 |        892        8.92       39.47
          6 |        877        8.77       48.24
          7 |        938        9.38       57.62
          8 |        913        9.13       66.75
          9 |        945        9.45       76.20
         10 |        862        8.62       84.82
         11 |        814        8.14       92.96
         12 |        704        7.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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