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

      month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        730        7.30        7.30
          2 |        694        6.94       14.24
          3 |        844        8.44       22.68
          4 |        827        8.27       30.95
          5 |        911        9.11       40.06
          6 |        854        8.54       48.60
          7 |      1,010       10.10       58.70
          8 |        883        8.83       67.53
          9 |        791        7.91       75.44
         10 |        862        8.62       84.06
         11 |        799        7.99       92.05
         12 |        795        7.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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