Frequencies for first 10,000 rows of ecpoeo variable in nhamcsopd2006 dataset :

      does emr |
system include |
  computerized |
    orders for |
prescriptions? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           Yes |      2,033       20.33       20.33
            No |      2,058       20.58       40.91
       Unknown |        116        1.16       42.07
Not applicable |      5,529       55.29       97.36
         Blank |        264        2.64      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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