Frequencies for month variable in accident dataset :

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         34        6.95        6.95
          2 |         45        9.20       16.16
          3 |         38        7.77       23.93
          4 |         45        9.20       33.13
          5 |         37        7.57       40.70
          6 |         31        6.34       47.03
          7 |         32        6.54       53.58
          8 |         49       10.02       63.60
          9 |         36        7.36       70.96
         10 |         53       10.84       81.80
         11 |         34        6.95       88.75
         12 |         55       11.25      100.00
------------+-----------------------------------
      Total |        489      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016