Frequencies for first 10,000 rows of residnce variable in nhamcsed2013 dataset :

Patient residence |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |         98        0.98        0.98
          Unknown |        223        2.23        3.21
Private residence |      9,109       91.09       94.30
     Nursing home |        148        1.48       95.78
         Homeless |        209        2.09       97.87
            Other |        213        2.13      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016