Frequencies for first 10,000 rows of lmpmon variable in natl2000 dataset :

 Month Last |
     Normal |
     Menses |
      Began |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         18        0.18        0.18
          2 |         70        0.70        0.88
          3 |        789        7.89        8.77
          4 |      3,642       36.42       45.19
          5 |      3,769       37.69       82.88
          6 |        987        9.87       92.75
          7 |        148        1.48       94.23
          8 |         68        0.68       94.91
          9 |         26        0.26       95.17
         10 |         14        0.14       95.31
         11 |          5        0.05       95.36
         12 |          7        0.07       95.43
         99 |        457        4.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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