Frequencies for first 10,000 rows of weekday variable in natl1990 dataset :

Day of Week |
 Child Born |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,150       11.50       11.50
          2 |      1,530       15.30       26.80
          3 |      1,598       15.98       42.78
          4 |      1,613       16.13       58.91
          5 |      1,501       15.01       73.92
          6 |      1,506       15.06       88.98
          7 |      1,102       11.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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