Frequencies for first 10,000 rows of retrned variable in nhamcsed2012 dataset :

  Return to |
         ED |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,545       95.45       95.45
        Yes |        455        4.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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