Frequencies for first 10,000 rows of birday variable in natl1985 dataset :

 Birth Date |
      - Day |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        361        3.61        3.61
          2 |        343        3.43        7.04
          3 |        356        3.56       10.60
          4 |        414        4.14       14.74
          5 |        348        3.48       18.22
          6 |        384        3.84       22.06
          7 |        365        3.65       25.71
          8 |        359        3.59       29.30
          9 |        350        3.50       32.80
         10 |        326        3.26       36.06
         11 |        382        3.82       39.88
         12 |        361        3.61       43.49
         13 |        314        3.14       46.63
         14 |        364        3.64       50.27
         15 |        366        3.66       53.93
         16 |        305        3.05       56.98
         17 |        301        3.01       59.99
         18 |        337        3.37       63.36
         19 |        329        3.29       66.65
         20 |        342        3.42       70.07
         21 |        318        3.18       73.25
         22 |        320        3.20       76.45
         23 |        297        2.97       79.42
         24 |        295        2.95       82.37
         25 |        332        3.32       85.69
         26 |        299        2.99       88.68
         27 |        288        2.88       91.56
         28 |        302        3.02       94.58
         29 |        191        1.91       96.49
         30 |        183        1.83       98.32
         31 |        166        1.66       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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