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

   does emr |
     system |
    include |
computerize |
   d orders |
        for |
prescriptio |
        ns? |      Freq.     Percent        Cum.
------------+-----------------------------------
        yes |      4,043       40.43       40.43
         no |      1,248       12.48       52.91
    unknown |        186        1.86       54.77
      blank |      4,523       45.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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