Frequencies for first 10,000 rows of vdayr variable in nhamcsopd2005 dataset :

day of week |
   of visit |      Freq.     Percent        Cum.
------------+-----------------------------------
     sunday |        104        1.04        1.04
     monday |      1,978       19.78       20.82
    tuesday |      2,307       23.07       43.89
  wednesday |      1,837       18.37       62.26
   thursday |      1,936       19.36       81.62
     friday |      1,693       16.93       98.55
   saturday |        145        1.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016