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

      does emr |
system include |
 public health |
    reporting? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           Yes |        390        3.90        3.90
            No |      3,000       30.00       33.90
       Unknown |        970        9.70       43.60
         Blank |      5,640       56.40      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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