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

        Do the |
  hospitalists |
   on staff at |
 your hospital |
admit patients |
 from your ED? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         Blank |      1,468       14.68       14.68
       Unknown |        318        3.18       17.86
           Yes |      7,945       79.45       97.31
            No |        269        2.69      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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