Frequencies for first 10,000 rows of epubhtho variable in nhamcsopd2007 dataset :

 does opd have |
      computer |
    system for |
 public health |
    reporting? |      Freq.     Percent        Cum.
---------------+-----------------------------------
       unknown |        851        8.51        8.51
           yes |      2,041       20.41       28.92
            no |      7,108       71.08      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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