Frequencies for first 10,000 rows of board variable in nhamcsed2010 dataset :

        Are |
admitted ED |
   patients |
       ever |
  'boarded' |
   for more |
     than 2 |
   hours in |
  the ED or |
      obs u |      Freq.     Percent        Cum.
------------+-----------------------------------
    unknown |        506        5.06        5.06
        yes |      6,652       66.52       71.58
         no |      2,842       28.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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