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

   Accident |
 Date-Month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,336       13.36       13.36
          2 |      1,196       11.96       25.32
          3 |      1,599       15.99       41.31
          4 |      1,245       12.45       53.76
          5 |        516        5.16       58.92
          6 |        608        6.08       65.00
          7 |        717        7.17       72.17
          8 |        605        6.05       78.22
          9 |        487        4.87       83.09
         10 |        624        6.24       89.33
         11 |        551        5.51       94.84
         12 |        516        5.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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