Frequencies for first 10,000 rows of board variable in nhamcsed2009 dataset :

        are |
admitted ed |
   patients |
       ever |
  'boarded' |
     for >2 |
hours in ed |
or obs unit |
  while wai |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        113        1.13        1.13
         -8 |        638        6.38        7.51
          1 |      8,204       82.04       89.55
          2 |      1,045       10.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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