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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,358       13.58       13.58
          2 |      1,257       12.57       26.15
          3 |      1,347       13.47       39.62
          4 |      1,265       12.65       52.27
          5 |      1,179       11.79       64.06
          6 |        633        6.33       70.39
          7 |        515        5.15       75.54
          8 |        536        5.36       80.90
          9 |        535        5.35       86.25
         10 |        452        4.52       90.77
         11 |        506        5.06       95.83
         12 |        417        4.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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