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

Does ED use |
 kiosk self |
  check-in? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |         57        0.57        0.57
    Unknown |        305        3.05        3.62
        Yes |        378        3.78        7.40
         No |      9,260       92.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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