Frequencies for first 10,000 rows of vdayr variable in nhamcsopd2006 dataset :

day of week |
   of visit |      Freq.     Percent        Cum.
------------+-----------------------------------
     Sunday |        111        1.11        1.11
     Monday |      1,894       18.94       20.05
    Tuesday |      2,105       21.05       41.10
  Wednesday |      2,071       20.71       61.81
   Thursday |      2,014       20.14       81.95
     Friday |      1,686       16.86       98.81
   Saturday |        119        1.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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