Frequencies for first 10,000 rows of vdayr variable in nhamcsed2015 dataset :

Day of Week |
   of Visit |      Freq.     Percent        Cum.
------------+-----------------------------------
     Sunday |      1,298       12.98       12.98
     Monday |      1,663       16.63       29.61
    Tuesday |      1,482       14.82       44.43
  Wednesday |      1,446       14.46       58.89
   Thursday |      1,385       13.85       72.74
     Friday |      1,412       14.12       86.86
   Saturday |      1,314       13.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017