Frequencies for first 10,000 rows of surgday variable in nhamcsed2014 dataset :

  Number of |
  days in a |
       week |
   elective |
  surgeries |
  scheduled |      Freq.     Percent        Cum.
------------+-----------------------------------
    Unknown |        732        7.32        7.32
          0 |        107        1.07        8.39
          1 |        119        1.19        9.58
          5 |      7,159       71.59       81.17
          6 |      1,390       13.90       95.07
          7 |        493        4.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017