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

        Are |
admitted ED |
   patients |
       ever |
  'boarded' |
   for more |
     than 2 |
   hours in |
  the ED or |
      obser |      Freq.     Percent        Cum.
------------+-----------------------------------
    Unknown |        539        5.39        5.39
        Yes |      7,552       75.52       80.91
         No |      1,909       19.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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