Frequencies for first 10,000 rows of board variable in nhamcsed2007 dataset :

        are |
admitted ed |
   patients |
       ever |
  'boarded' |
     for >2 |
hours in ed |
      while |
waiting for |
        an  |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        103        1.03        1.03
    unknown |        138        1.38        2.41
        yes |      8,107       81.07       83.48
         no |      1,652       16.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016