Frequencies for first 10,000 rows of ewhooth variable in namcs2011 dataset :

 Orders for Rx or |
   lab tests sent |
      by: other - |
         unedited |      Freq.     Percent        Cum.
------------------+-----------------------------------
Box is not marked |      6,886       68.86       68.86
    Box is marked |      3,114       31.14      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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