Frequencies for first 10,000 rows of enotdis variable in namcs2007 dataset :

   if yes, are |
    notifiable |
 diseases sent |
electronically |
             ? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        198        1.98        1.98
       unknown |        234        2.34        4.32
not applicable |      8,007       80.07       84.39
           yes |        915        9.15       93.54
            no |        646        6.46      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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