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

       Is this |
observation or |
      clinical |
 decision unit |
    physically |
 separate from |
       the ED? |      Freq.     Percent        Cum.
---------------+-----------------------------------
Not applicable |      5,085       50.85       50.85
           Yes |      2,914       29.14       79.99
            No |      2,001       20.01      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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