Frequencies for first 10,000 rows of rfid variable in nhamcsed2007 dataset :

  does your |
     ed use |
      radio |
  frequency |
identificat |
 ion (rfid) |
  tracking? |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,582       85.82       85.82
        yes |      1,418       14.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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