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

   Day Last |
     Normal |
     Menses |
      Began |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        529        5.29        5.29
          2 |        258        2.58        7.87
          3 |        275        2.75       10.62
          4 |        249        2.49       13.11
          5 |        372        3.72       16.83
          6 |        237        2.37       19.20
          7 |        270        2.70       21.90
          8 |        257        2.57       24.47
          9 |        216        2.16       26.63
         10 |        365        3.65       30.28
         11 |        172        1.72       32.00
         12 |        253        2.53       34.53
         13 |        209        2.09       36.62
         14 |        268        2.68       39.30
         15 |        681        6.81       46.11
         16 |        265        2.65       48.76
         17 |        264        2.64       51.40
         18 |        240        2.40       53.80
         19 |        223        2.23       56.03
         20 |        409        4.09       60.12
         21 |        236        2.36       62.48
         22 |        216        2.16       64.64
         23 |        233        2.33       66.97
         24 |        260        2.60       69.57
         25 |        372        3.72       73.29
         26 |        263        2.63       75.92
         27 |        241        2.41       78.33
         28 |        322        3.22       81.55
         29 |        199        1.99       83.54
         30 |        232        2.32       85.86
         31 |         61        0.61       86.47
         99 |      1,353       13.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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