Frequencies for first 10,000 rows of vdayr variable in nhamcsopd2010 dataset :

day of week |
   of visit |      Freq.     Percent        Cum.
------------+-----------------------------------
     sunday |        122        1.22        1.22
     monday |      1,954       19.54       20.76
    tuesday |      2,199       21.99       42.75
  wednesday |      2,100       21.00       63.75
   thursday |      1,877       18.77       82.52
     friday |      1,587       15.87       98.39
   saturday |        161        1.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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