Frequencies for first 10,000 rows of dob_mm variable in natlterr2005 dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,174       41.74       41.74
          2 |        535        5.35       47.09
          3 |        531        5.31       52.40
          4 |        519        5.19       57.59
          5 |        537        5.37       62.96
          6 |        524        5.24       68.20
          7 |        588        5.88       74.08
          8 |        498        4.98       79.06
          9 |        537        5.37       84.43
         10 |        553        5.53       89.96
         11 |        504        5.04       95.00
         12 |        500        5.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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