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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        774        7.74        7.74
          2 |        797        7.97       15.71
          3 |        875        8.75       24.46
          4 |        908        9.08       33.54
          5 |        889        8.89       42.43
          6 |        875        8.75       51.18
          7 |        942        9.42       60.60
          8 |        969        9.69       70.29
          9 |        756        7.56       77.85
         10 |        776        7.76       85.61
         11 |        701        7.01       92.62
         12 |        738        7.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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