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

Last Normal |
   Menses - |
  Month U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |        219        2.19        2.19
          4 |      3,135       31.35       33.54
          5 |      3,996       39.96       73.50
          6 |      2,207       22.07       95.57
          7 |        254        2.54       98.11
          8 |         57        0.57       98.68
          9 |          8        0.08       98.76
         99 |        124        1.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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