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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,204       12.04       12.04
          2 |      1,313       13.13       25.17
          3 |      1,549       15.49       40.66
          4 |      1,298       12.98       53.64
          5 |        909        9.09       62.73
          6 |        492        4.92       67.65
          7 |        535        5.35       73.00
          8 |        526        5.26       78.26
          9 |        561        5.61       83.87
         10 |        545        5.45       89.32
         11 |        492        4.92       94.24
         12 |        576        5.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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