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

 Crash Date |
    (MONTH) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        843        8.43        8.43
          2 |        794        7.94       16.37
          3 |        926        9.26       25.63
          4 |        974        9.74       35.37
          5 |        978        9.78       45.15
          6 |        912        9.12       54.27
          7 |        950        9.50       63.77
          8 |        840        8.40       72.17
          9 |        706        7.06       79.23
         10 |        692        6.92       86.15
         11 |        732        7.32       93.47
         12 |        653        6.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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