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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        812        8.12        8.12
          2 |        728        7.28       15.40
          3 |        825        8.25       23.65
          4 |        903        9.03       32.68
          5 |        945        9.45       42.13
          6 |        901        9.01       51.14
          7 |        943        9.43       60.57
          8 |        963        9.63       70.20
          9 |        811        8.11       78.31
         10 |        764        7.64       85.95
         11 |        693        6.93       92.88
         12 |        712        7.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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