Frequencies for first 10,000 rows of econr variable in namcs2002 dataset :

       Does |
  physician |
   do email |
  consults? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      8,024       80.24       80.24
        Yes |        422        4.22       84.46
      Blank |      1,554       15.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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