Frequencies for first 10,000 rows of dob_mm variable in natlterr2008 dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,183       41.83       41.83
          2 |        703        7.03       48.86
          3 |        521        5.21       54.07
          4 |        493        4.93       59.00
          5 |        493        4.93       63.93
          6 |        482        4.82       68.75
          7 |        508        5.08       73.83
          8 |        541        5.41       79.24
          9 |        489        4.89       84.13
         10 |        542        5.42       89.55
         11 |        515        5.15       94.70
         12 |        530        5.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016