Frequencies for first 10,000 rows of vdayr variable in nhamcsed2013 dataset :

Day of Week |
   of Visit |      Freq.     Percent        Cum.
------------+-----------------------------------
     Sunday |      1,315       13.15       13.15
     Monday |      1,631       16.31       29.46
    Tuesday |      1,504       15.04       44.50
  Wednesday |      1,431       14.31       58.81
   Thursday |      1,402       14.02       72.83
     Friday |      1,390       13.90       86.73
   Saturday |      1,327       13.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016