Frequencies for first 10,000 rows of epnoteso variable in nhamcsopd2005 dataset :

   does emr |
     system |
    include |
physicians' |
     notes? |      Freq.     Percent        Cum.
------------+-----------------------------------
        yes |      3,704       37.04       37.04
         no |      1,773       17.73       54.77
      blank |      4,523       45.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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