Frequencies for first 10,000 rows of edemog variable in namcs2005 dataset :

          does |
practice's emr |
system include |
       patient |
   demographic |
         info? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           Yes |      2,197       21.97       21.97
            No |        237        2.37       24.34
       Unknown |        108        1.08       25.42
Not applicable |      7,458       74.58      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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