Frequencies for first 10,000 rows of ehrwho7r variable in namcs2010 dataset :

    orders for rx or lab |
 tests sent by unknown - |
                  edited |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
n/a based on ectoe/ecpoe |      3,484       34.84       34.84
       box is not marked |      6,052       60.52       95.36
           box is marked |        464        4.64      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

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