Frequencies for first 10,000 rows of dlmp_mm variable in natlterr2006 dataset :

Last Normal |
   Menses - |
  Month U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        456        4.56        4.56
          2 |        405        4.05        8.61
          3 |        575        5.75       14.36
          4 |      2,778       27.78       42.14
          5 |      1,399       13.99       56.13
          6 |        425        4.25       60.38
          7 |        380        3.80       64.18
          8 |        360        3.60       67.78
          9 |        381        3.81       71.59
         10 |        410        4.10       75.69
         11 |        440        4.40       80.09
         12 |        411        4.11       84.20
         99 |      1,580       15.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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