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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,099       10.99       10.99
          2 |      1,188       11.88       22.87
          3 |      1,308       13.08       35.95
          4 |      1,293       12.93       48.88
          5 |      1,047       10.47       59.35
          6 |        639        6.39       65.74
          7 |        661        6.61       72.35
          8 |        611        6.11       78.46
          9 |        494        4.94       83.40
         10 |        599        5.99       89.39
         11 |        505        5.05       94.44
         12 |        556        5.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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