Frequencies for first 10,000 rows of ehrwho4r variable in namcs2010 dataset :

    orders for rx or lab |
           tests sent by |
administrative personnel |
                - edited |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
n/a based on ectoe/ecpoe |      3,484       34.84       34.84
       box is not marked |      5,844       58.44       93.28
           box is marked |        672        6.72      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

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