Frequencies for first 10,000 rows of kioselchk variable in nhamcsed2012 dataset :

Does ED use |
 kiosk self |
  check-in? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        152        1.52        1.52
    Unknown |        675        6.75        8.27
        Yes |        215        2.15       10.42
         No |      8,958       89.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016