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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,363       13.63       13.63
          2 |      1,321       13.21       26.84
          3 |      1,405       14.05       40.89
          4 |      1,149       11.49       52.38
          5 |        481        4.81       57.19
          6 |        629        6.29       63.48
          7 |        704        7.04       70.52
          8 |        696        6.96       77.48
          9 |        621        6.21       83.69
         10 |        583        5.83       89.52
         11 |        511        5.11       94.63
         12 |        537        5.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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