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

 does opd have |
      computer |
    system for |
      clinical |
        notes? |      Freq.     Percent        Cum.
---------------+-----------------------------------
       unknown |        482        4.82        4.82
           yes |      5,106       51.06       55.88
            no |      4,412       44.12      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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