Frequencies for first 10,000 rows of dob_mm variable in natlterr2012 dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,786       37.86       37.86
          2 |      1,413       14.13       51.99
          3 |        502        5.02       57.01
          4 |        455        4.55       61.56
          5 |        473        4.73       66.29
          6 |        493        4.93       71.22
          7 |        504        5.04       76.26
          8 |        481        4.81       81.07
          9 |        470        4.70       85.77
         10 |        493        4.93       90.70
         11 |        469        4.69       95.39
         12 |        461        4.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016