Frequencies for first 10,000 rows of dlmp_mm variable in natl2016 dataset :

Last Normal |
     Menses |
   Month 01 |
    January |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        873        8.73        8.73
          2 |        532        5.32       14.05
          3 |        238        2.38       16.43
          4 |        734        7.34       23.77
          5 |        813        8.13       31.90
          6 |        848        8.48       40.38
          7 |        905        9.05       49.43
          8 |        900        9.00       58.43
          9 |        877        8.77       67.20
         10 |        906        9.06       76.26
         11 |        840        8.40       84.66
         12 |        961        9.61       94.27
         99 |        573        5.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017