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

 Crash Date |
    (Month) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        827        8.27        8.27
          2 |        724        7.24       15.51
          3 |        810        8.10       23.61
          4 |        755        7.55       31.16
          5 |        849        8.49       39.65
          6 |        858        8.58       48.23
          7 |        932        9.32       57.55
          8 |        831        8.31       65.86
          9 |        843        8.43       74.29
         10 |        914        9.14       83.43
         11 |        813        8.13       91.56
         12 |        844        8.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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