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

   if yes, are |
    notifiable |
 diseases sent |
electronically |
             ? |      Freq.     Percent        Cum.
---------------+-----------------------------------
       unknown |        416        4.16        4.16
not applicable |      7,959       79.59       83.75
           yes |      1,280       12.80       96.55
            no |        345        3.45      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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