Frequencies for first 10,000 rows of disch7da variable in nhamcsed2006 dataset :

 discharged |
   from any |
   hospital |
within last |
     7 days |      Freq.     Percent        Cum.
------------+-----------------------------------
        yes |        202        2.02        2.02
         no |      7,447       74.47       76.49
    unknown |      2,180       21.80       98.29
      blank |        171        1.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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