Frequencies for first 10,000 rows of edemog variable in namcs2008 dataset :

  practice has |
      computer |
system for pat |
   demographic |
         info? |      Freq.     Percent        Cum.
---------------+-----------------------------------
       unknown |         52        0.52        0.52
           yes |      8,511       85.11       85.63
            no |      1,437       14.37      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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