Frequencies for first 10,000 rows of epnoteso variable in nhamcsopd2008 dataset :

 does opd have |
      computer |
    system for |
      clinical |
        notes? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        309        3.09        3.09
       unknown |        310        3.10        6.19
           yes |      5,607       56.07       62.26
            no |      3,774       37.74      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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