Frequencies for first 10,000 rows of lmpday variable in natlterr2000 dataset :

   Day Last |
     Normal |
     Menses |
      Began |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        345        3.45        3.45
          2 |        276        2.76        6.21
          3 |        336        3.36        9.57
          4 |        288        2.88       12.45
          5 |        454        4.54       16.99
          6 |        310        3.10       20.09
          7 |        339        3.39       23.48
          8 |        301        3.01       26.49
          9 |        321        3.21       29.70
         10 |        439        4.39       34.09
         11 |        268        2.68       36.77
         12 |        344        3.44       40.21
         13 |        328        3.28       43.49
         14 |        274        2.74       46.23
         15 |        583        5.83       52.06
         16 |        293        2.93       54.99
         17 |        276        2.76       57.75
         18 |        274        2.74       60.49
         19 |        281        2.81       63.30
         20 |        409        4.09       67.39
         21 |        283        2.83       70.22
         22 |        249        2.49       72.71
         23 |        300        3.00       75.71
         24 |        277        2.77       78.48
         25 |        430        4.30       82.78
         26 |        293        2.93       85.71
         27 |        281        2.81       88.52
         28 |        351        3.51       92.03
         29 |        228        2.28       94.31
         30 |        301        3.01       97.32
         31 |         74        0.74       98.06
         99 |        194        1.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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