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

   if yes, are |
   orders sent |
electronically |
             ? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           Yes |      1,724       17.24       17.24
            No |        432        4.32       21.56
       Unknown |        147        1.47       23.03
Not applicable |      7,395       73.95       96.98
         Blank |        302        3.02      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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