Frequencies for first 10,000 rows of birday variable in natl1983 dataset :

 Birth Date |
      - Day |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        396        3.96        3.96
          2 |        338        3.38        7.34
          3 |        356        3.56       10.90
          4 |        410        4.10       15.00
          5 |        308        3.08       18.08
          6 |        330        3.30       21.38
          7 |        364        3.64       25.02
          8 |        354        3.54       28.56
          9 |        349        3.49       32.05
         10 |        351        3.51       35.56
         11 |        411        4.11       39.67
         12 |        336        3.36       43.03
         13 |        326        3.26       46.29
         14 |        345        3.45       49.74
         15 |        343        3.43       53.17
         16 |        318        3.18       56.35
         17 |        389        3.89       60.24
         18 |        347        3.47       63.71
         19 |        300        3.00       66.71
         20 |        312        3.12       69.83
         21 |        352        3.52       73.35
         22 |        336        3.36       76.71
         23 |        335        3.35       80.06
         24 |        294        2.94       83.00
         25 |        314        3.14       86.14
         26 |        270        2.70       88.84
         27 |        302        3.02       91.86
         28 |        343        3.43       95.29
         29 |        161        1.61       96.90
         30 |        140        1.40       98.30
         31 |        170        1.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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