Frequencies for first 10,000 rows of disch7da variable in nhamcsed2010 dataset :

 Discharged |
   from any |
   hospital |
 within the |
last 7 days |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        105        1.05        1.05
    unknown |      3,685       36.85       37.90
        yes |        279        2.79       40.69
         no |      5,931       59.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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