Frequencies for first 10,000 rows of confid variable in demo2008q4 dataset :

 Whether or |
  not (Y/N) |
  voluntary |
   reporter |
  disclosed |
   identity |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,210       92.10       92.10
          N |        453        4.53       96.63
          Y |        337        3.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015