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

   if yes, are |
   orders sent |
electronically |
             ? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        401        4.01        4.01
       unknown |        115        1.15        5.16
not applicable |      6,609       66.09       71.25
           yes |      2,027       20.27       91.52
            no |        848        8.48      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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