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

      does emr |
system include |
  lab results? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           yes |      5,138       51.38       51.38
       unknown |        376        3.76       55.14
    turned off |        100        1.00       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