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

  does ed have |
  computerized |
    system for |
    orders for |
        tests? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |         70        0.70        0.70
       unknown |         60        0.60        1.30
           yes |      8,902       89.02       90.32
            no |        968        9.68      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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