Frequencies for first 10,000 rows of vdayr variable in nhamcsopd2007 dataset :

day of week |
   of visit |      Freq.     Percent        Cum.
------------+-----------------------------------
     sunday |         90        0.90        0.90
     monday |      1,891       18.91       19.81
    tuesday |      2,056       20.56       40.37
  wednesday |      1,978       19.78       60.15
   thursday |      2,074       20.74       80.89
     friday |      1,809       18.09       98.98
   saturday |        102        1.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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