Frequencies for first 10,000 rows of eresulto variable in nhamcsopd2007 dataset :

 does opd have |
      computer |
    system for |
viewing of lab |
      results? |      Freq.     Percent        Cum.
---------------+-----------------------------------
       unknown |         99        0.99        0.99
           yes |      7,480       74.80       75.79
            no |      2,421       24.21      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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