Frequencies for first 10,000 rows of eimgrese variable in nhamcsed2008 dataset :

  does ed have |
  computerized |
    system for |
    viewing of |
       imaging |
      results? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        176        1.76        1.76
       unknown |        115        1.15        2.91
           yes |      8,704       87.04       89.95
            no |      1,005       10.05      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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