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

   admit to |
observation |
 unit, then |
hospitalize |
          d |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,927       99.27       99.27
          1 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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