Frequencies for first 10,000 rows of obsdis variable in nhamcsed2013 dataset :

   Admit to |
observation |
 unit, then |
 discharged |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,736       97.36       97.36
        Yes |        264        2.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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