Frequencies for first 10,000 rows of compunk variable in namcs2013 dataset :

    Considered in |
        determing |
    compensation: |
          unknown |      Freq.     Percent        Cum.
------------------+-----------------------------------
Entire item blank |        876        8.76        8.76
Box is not marked |      8,986       89.86       98.62
    Box is marked |        138        1.38      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017