Frequencies for first 10,000 rows of dob_mm variable in natlterr2006 dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,074       40.74       40.74
          2 |        578        5.78       46.52
          3 |        518        5.18       51.70
          4 |        463        4.63       56.33
          5 |        529        5.29       61.62
          6 |        501        5.01       66.63
          7 |        569        5.69       72.32
          8 |        598        5.98       78.30
          9 |        550        5.50       83.80
         10 |        568        5.68       89.48
         11 |        511        5.11       94.59
         12 |        541        5.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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