Frequencies for first 10,000 rows of ectoee variable in nhamcsed2006 dataset :

      does emr |
system include |
  computerized |
    orders for |
        tests? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           yes |      4,505       45.05       45.05
            no |        615        6.15       51.20
       unknown |        494        4.94       56.14
not applicable |      4,164       41.64       97.78
         blank |        222        2.22      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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