Frequencies for first 10,000 rows of dlmp_mm variable in natl2014 dataset :

Last Normal |
     Menses |
   Month 01 |
    January |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        791        7.91        7.91
          2 |        482        4.82       12.73
          3 |        205        2.05       14.78
          4 |        749        7.49       22.27
          5 |        881        8.81       31.08
          6 |        845        8.45       39.53
          7 |        876        8.76       48.29
          8 |        908        9.08       57.37
          9 |        856        8.56       65.93
         10 |        895        8.95       74.88
         11 |        861        8.61       83.49
         12 |        878        8.78       92.27
         99 |        773        7.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016