Frequencies for first 10,000 rows of birday variable in natl1982 dataset :

 Birth Date |
      - Day |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        355        3.55        3.55
          2 |        395        3.95        7.50
          3 |        407        4.07       11.57
          4 |        450        4.50       16.07
          5 |        394        3.94       20.01
          6 |        322        3.22       23.23
          7 |        334        3.34       26.57
          8 |        379        3.79       30.36
          9 |        327        3.27       33.63
         10 |        320        3.20       36.83
         11 |        368        3.68       40.51
         12 |        352        3.52       44.03
         13 |        327        3.27       47.30
         14 |        349        3.49       50.79
         15 |        334        3.34       54.13
         16 |        319        3.19       57.32
         17 |        306        3.06       60.38
         18 |        351        3.51       63.89
         19 |        358        3.58       67.47
         20 |        287        2.87       70.34
         21 |        317        3.17       73.51
         22 |        391        3.91       77.42
         23 |        308        3.08       80.50
         24 |        321        3.21       83.71
         25 |        304        3.04       86.75
         26 |        292        2.92       89.67
         27 |        293        2.93       92.60
         28 |        287        2.87       95.47
         29 |        155        1.55       97.02
         30 |        142        1.42       98.44
         31 |        156        1.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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