Frequencies for first 10,000 rows of residnce variable in nhamcsed2011 dataset :

Patient residence |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |        250        2.50        2.50
          Unknown |        104        1.04        3.54
Private residence |      9,259       92.59       96.13
     Nursing home |        205        2.05       98.18
         Homeless |         85        0.85       99.03
            Other |         97        0.97      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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