Frequencies for first 10,000 rows of rfid variable in nhamcsed2011 dataset :

  Does your |
     ED use |
      radio |
  frequency |
identificat |
        ion |
  tracking? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        131        1.31        1.31
    Unknown |        584        5.84        7.15
        Yes |      1,756       17.56       24.71
         No |      7,529       75.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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