Frequencies for first 10,000 rows of dlmp_mm variable in natlterr2011 dataset :

Last Normal |
   Menses - |
  Month U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        178        1.78        1.78
          2 |        177        1.77        3.55
          3 |        361        3.61        7.16
          4 |      2,413       24.13       31.29
          5 |      1,907       19.07       50.36
          6 |        472        4.72       55.08
          7 |        292        2.92       58.00
          8 |        272        2.72       60.72
          9 |        226        2.26       62.98
         10 |        172        1.72       64.70
         11 |        139        1.39       66.09
         12 |        163        1.63       67.72
         99 |      3,228       32.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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