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

 crash date |
    (month) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        939        9.39        9.39
          2 |        836        8.36       17.75
          3 |        989        9.89       27.64
          4 |        894        8.94       36.58
          5 |        899        8.99       45.57
          6 |      1,014       10.14       55.71
          7 |        916        9.16       64.87
          8 |      1,003       10.03       74.90
          9 |        825        8.25       83.15
         10 |        793        7.93       91.08
         11 |        441        4.41       95.49
         12 |        451        4.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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