Frequencies for first 10,000 rows of ehrwho7 variable in namcs2010 dataset :

 orders for rx or |
lab tests sent by |
        unknown - |
         unedited |      Freq.     Percent        Cum.
------------------+-----------------------------------
box is not marked |      9,439       94.39       94.39
    box is marked |        561        5.61      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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