Frequencies for first 10,000 rows of surgday variable in nhamcsed2015 dataset :

   How many |
  days in a |
   week are |
  inpatient |
   elective |
  surgeries |
 scheduled? |      Freq.     Percent        Cum.
------------+-----------------------------------
    Unknown |        643        6.43        6.43
          0 |        111        1.11        7.54
          1 |         71        0.71        8.25
          3 |        107        1.07        9.32
          4 |        190        1.90       11.22
          5 |      7,253       72.53       83.75
          6 |      1,408       14.08       97.83
          7 |        217        2.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017