Frequencies for first 10,000 rows of dob_mm variable in natlterr2011 dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,621       36.21       36.21
          2 |      1,604       16.04       52.25
          3 |        465        4.65       56.90
          4 |        450        4.50       61.40
          5 |        485        4.85       66.25
          6 |        455        4.55       70.80
          7 |        469        4.69       75.49
          8 |        465        4.65       80.14
          9 |        510        5.10       85.24
         10 |        507        5.07       90.31
         11 |        494        4.94       95.25
         12 |        475        4.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015