Frequencies for first 10,000 rows of eimagee variable in nhamcsed2009 dataset :

if yes, are |
 electronic |
     images |
  returned? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |        117        1.17        1.17
         -7 |      1,442       14.42       15.59
          1 |      8,025       80.25       95.84
          2 |        416        4.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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