Frequencies for first 10,000 rows of epnotes variable in namcs2009 dataset :

  practice has |
  computerized |
    system for |
      clinical |
        notes? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |         37        0.37        0.37
       unknown |         64        0.64        1.01
           yes |      5,062       50.62       51.63
            no |      4,814       48.14       99.77
    turned off |         23        0.23      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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