Frequencies for first 10,000 rows of eimage variable in namcs2009 dataset :

   if yes, are |
    electronic |
        images |
     returned? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        281        2.81        2.81
       unknown |        604        6.04        8.85
not applicable |      5,262       52.62       61.47
           yes |      2,372       23.72       85.19
            no |      1,435       14.35       99.54
    turned off |         46        0.46      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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