Frequencies for first 10,000 rows of dlmp_mm variable in natl2008 dataset :

Last Normal |
   Menses - |
  Month U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         14        0.14        0.14
          2 |         70        0.70        0.84
          3 |        560        5.60        6.44
          4 |      3,767       37.67       44.11
          5 |      4,204       42.04       86.15
          6 |        864        8.64       94.79
          7 |        183        1.83       96.62
          8 |         74        0.74       97.36
          9 |         19        0.19       97.55
         10 |         13        0.13       97.68
         11 |          5        0.05       97.73
         12 |          8        0.08       97.81
         99 |        219        2.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016