Frequencies for first 10,000 rows of dob_mm variable in natlterr2003 dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,475       44.75       44.75
          2 |      3,854       38.54       83.29
          3 |      1,671       16.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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