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

      month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        828        8.28        8.28
          2 |        750        7.50       15.78
          3 |        801        8.01       23.79
          4 |        823        8.23       32.02
          5 |        814        8.14       40.16
          6 |        837        8.37       48.53
          7 |        959        9.59       58.12
          8 |        871        8.71       66.83
          9 |        859        8.59       75.42
         10 |        965        9.65       85.07
         11 |        855        8.55       93.62
         12 |        638        6.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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