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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        727        7.27        7.27
          2 |        745        7.45       14.72
          3 |        820        8.20       22.92
          4 |        846        8.46       31.38
          5 |        860        8.60       39.98
          6 |        740        7.40       47.38
          7 |        917        9.17       56.55
          8 |        905        9.05       65.60
          9 |        914        9.14       74.74
         10 |        866        8.66       83.40
         11 |        808        8.08       91.48
         12 |        852        8.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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