Frequencies for first 10,000 rows of eordero variable in nhamcsopd2008 dataset :

   if yes, are |
   orders sent |
electronically |
             ? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        309        3.09        3.09
       unknown |        599        5.99        9.08
not applicable |      3,478       34.78       43.86
           yes |      5,359       53.59       97.45
            no |        255        2.55      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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