Frequencies for first 10,000 rows of dlmp_mm variable in natlterr2009 dataset :

Last Normal |
   Menses - |
  Month U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        418        4.18        4.18
          2 |        659        6.59       10.77
          3 |        998        9.98       20.75
          4 |      2,672       26.72       47.47
          5 |      1,408       14.08       61.55
          6 |        387        3.87       65.42
          7 |        325        3.25       68.67
          8 |        328        3.28       71.95
          9 |        274        2.74       74.69
         10 |        330        3.30       77.99
         11 |        316        3.16       81.15
         12 |        377        3.77       84.92
         99 |      1,508       15.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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