Frequencies for first 10,000 rows of confid variable in demo2009q1 dataset :

 Whether or |
  not (Y/N) |
  voluntary |
   reporter |
  disclosed |
   identity |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,970       89.70       89.70
          N |        660        6.60       96.30
          Y |        370        3.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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