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

 Crash Date |
    (MONTH) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        810        8.10        8.10
          2 |        817        8.17       16.27
          3 |        901        9.01       25.28
          4 |      1,043       10.43       35.71
          5 |        978        9.78       45.49
          6 |        865        8.65       54.14
          7 |      1,015       10.15       64.29
          8 |      1,015       10.15       74.44
          9 |      1,057       10.57       85.01
         10 |        611        6.11       91.12
         11 |        467        4.67       95.79
         12 |        421        4.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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