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

   Admit to |
observation |
 unit, then |
hospitalize |
          d |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,909       99.09       99.09
        yes |         91        0.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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