Frequencies for first 10,000 rows of epnoteso variable in nhamcsopd2009 dataset :

 does opd have |
  computerized |
    system for |
      clinical |
        notes? |      Freq.     Percent        Cum.
---------------+-----------------------------------
       unknown |        336        3.36        3.36
           yes |      5,977       59.77       63.13
            no |      3,687       36.87      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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