Frequencies for first 10,000 rows of epnotes variable in namcs2008 dataset :

  practice has |
      computer |
    system for |
      clinical |
        notes? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |         54        0.54        0.54
       unknown |         44        0.44        0.98
           yes |      4,734       47.34       48.32
            no |      5,033       50.33       98.65
    turned off |        135        1.35      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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