Frequencies for first 10,000 rows of dob_mm variable in natlterr2007 dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,262       42.62       42.62
          2 |        484        4.84       47.46
          3 |        487        4.87       52.33
          4 |        533        5.33       57.66
          5 |        556        5.56       63.22
          6 |        500        5.00       68.22
          7 |        515        5.15       73.37
          8 |        559        5.59       78.96
          9 |        542        5.42       84.38
         10 |        525        5.25       89.63
         11 |        522        5.22       94.85
         12 |        515        5.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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