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

 crash date |
    (month) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        888        8.88        8.88
          2 |        776        7.76       16.64
          3 |      1,037       10.37       27.01
          4 |        965        9.65       36.66
          5 |        952        9.52       46.18
          6 |        912        9.12       55.30
          7 |        780        7.80       63.10
          8 |        795        7.95       71.05
          9 |        727        7.27       78.32
         10 |        802        8.02       86.34
         11 |        682        6.82       93.16
         12 |        684        6.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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