Frequencies for first 10,000 rows of compunk variable in namcs2012 dataset :

    Considered in |
        determing |
    compensation: |
          unknown |      Freq.     Percent        Cum.
------------------+-----------------------------------
Box is not marked |      9,319       93.19       93.19
    Box is marked |        681        6.81      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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