Frequencies for first 10,000 rows of dob_mm variable in natl2017 dataset :

Birth Month |
 01 January |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        783        7.83        7.83
          2 |        774        7.74       15.57
          3 |        899        8.99       24.56
          4 |        860        8.60       33.16
          5 |        885        8.85       42.01
          6 |        888        8.88       50.89
          7 |        904        9.04       59.93
          8 |        923        9.23       69.16
          9 |        922        9.22       78.38
         10 |        856        8.56       86.94
         11 |        791        7.91       94.85
         12 |        515        5.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018